CHANGELOG.md



To find the state of this project's repository at the time of any of these versions, check out the tags.


Changelog

v5.7.0
Library

Modified MatrixFreeOp library  switch initialisation to use BOOST_PP (!1794)
Fix memory-leak with LowEnergyBlock preconditioner for time-updated matrices (!1627)
Fix Fourier expansion integration weights are related test (!1803)
Separate MeshGraph input/output functions into a new class (!1778)
Added checkpoint file writing start time in the fieldconvert filter (!1789)
Fix fieldconvert filter incorrect boundary values (!1789)
Fix numerical precision issues with filters OutputStartTime (!1789)
Fix AdaptiveSFD for MPI (!1821)
Fix IterativeStaticCond when using absolute tolerance (!1850)
Fix deadlock by scotch with multi-threading support (!1853)
Fixed L2norm for FilterError (!1871)

IncNavierStokesSolver

Fix initial and boundary conditions in the moving reference frame (!1692, !1820)
Fix memory-leak for the Mixed_CG_Discontinuous projection when initializing the traceMep (!1806)
Add synthetic turbulence generation for the incompressible solver (!1664)

ShallowWaterSolver

Implement implicit time-discritization (!1784)

NekMesh

Added revolve module (!1825)

FieldConvert

Add vortexinducedvelocity module to compute the vortex-induced velocity (!1824)
Add a module to transform coordinates and vectors for the moving reference frame method (!1830)

Miscellaneous

Use std::stod instead of boost::lexical_cast (!1819)

Documentation

Add initial documentation for the IncNavierStokesSolver (!1822)


v5.6.0
Library

Clean-up Set_Rhs_Magnitude function in NekLinSysIter (!1729)
Consistently use template parameters in VmathArray (!1748)
Fix issue with CMake and zlib versions >= 1.3.0 (!1744)
Add 1D demo and test of h-type convergence for a CG projection. (!1738)
Add 2D projection demo and tests following 1D added in MR !1738. (!1762)
Tidy up tolerance in NekLinSystIter and NekNonlinSysIter solvers (!1722)
Enable varcoeffs for Collections (!1701)
Fix misplaced " in Nektar++Config.cmake (!1742)
Further tidy-up in linear solver (!1761)
Use FwdTrans in UnsteadySystem when using Parareal (!1785)
Automate deployment of README.md to dockerhub (!1786)
Fix memory leak with Block preconditioner for time-updated matrices (!1737)
Support for implicit sliding meshes (!1787)
Fix compilation issue with OpenCASCADE 7.8.0 (!1799)
Fix MPI communicator for Parallel-in-Time (!1801)
Fix warnings issued by MSVC compiler in LibUtilities and StdRegions (!1740)
Fix Parareal convergence monitoring (!1802)
Avoid copying input/output to/from padded aligned arrays in MatrixFree operators(!1783)

CompressibleFlowSolver

Complete second Frechet derivative implementation (!1761)
Add conditional updating of elemental Mass and Laplacian matrices for LinearADR matrices (!1766)
Added routine to order expansion in an optimal manner for MatrixFree/Collection ops (!1770)
Fix PFASST I/O and pre-initialize coarse preconditioner for Parareal (!1749)
Remove collection offset arrays since no longer required (!1771)
Fix summary output (!1779)
Update Docker images to use bookworm (!1775)
Update clang-tidy and clang-format to v16 (!1777)
Add coverage metric capturing (!1776)

ShallowWaterSolver

Refractoring to reduce code duplication (!1782)

NekPy

Add binding to NekPy to check of geometry elements are valid (!1755)
Update NekPy to more modern packaging (!1747)
Add wrapper for selected SolverUtils classes, particularly Filter (!1379)
Add VTK support for OutputVtk module (!1379)
Add bindings for SolverUtils::EquationSystem and UnsteadySystem (!1752)
Return native Python types when getting session variables and parameters (!1380)

NekMesh

Fix optiKind flags in VarOpti for freenodes that are on more than a single curve / surface (!1597)
Fix VarOpti Surface Node Sliding on the CAD in 2D  (!1569)
Add feature for r-adaption on user-defined CAD curves (!1349)
Add feature for r-adaption on user-defined CAD curves (!1349)
Add unit testing infrustructure and initial example (!1753)
Added a custom cmake cache file to load defaults for building only NekMesh without the solvers (!1641)
Extend peralign module to all types of meshes (!1702)

IncNavierStokesSolver

Matrix-Free LinearADR operator for VCSImplicit and others (!1627)
Make substepping normal velocity evaluation more efficient (!1795)

FieldConvert

Add range function as an option in Xml Input, align python usage and start depracation of -r option (!1791)


v5.5.0
Library

Fix Nektar++Config.cmake to use MPI_CXX (!1224)
Redesign of Parareal and PFASST driver (!1613)
Update default global system solver parameters for paralell-in-time (!1649)
Add member function in MPI communicator to check if time-parallel is enable (!1647)
Fixed FilterError for homogeneous expansions (!1640)
Fix ForcingAbsorption for homogeneous expansions (!1650)
Update AssemblyMap to reduce verbosity when using parallel-in-time (!1651)
Tidy-up of Collection library (!1622)
Tidy-up of I/O in BasicUtils (!1623)
Fix local implementation of CG with Null preconditioner (!1658)
Update to use C++17 nested namespaces (!1556, !1670)
Fix a minor bug in ProcessWallNormalData (!1663)
Fix Explist::v_GetNormals and GetElmtNormalLength (!1625)
Replace boost::random with std::random (!1673)
Add a new feature of Lagrangian points tracking in parallel (!1666)
Add Robin BC to xxt full solver (!1679)
Update Parareal file output and tidy-up Parareal/PFASST interpolation (!1678)
Move from boost::filesystem to std::filesystem (!1674)
Use [[deprecated]] attribute (!1682)
Fix QuadExp::v_ComputeTraceNormals(!1685)
Replace boost::thread with std::thread (!1687)
Replace boost::math::tgamma by std::tgamma(!1686)
Remove #include <boost/math/special_functions/fpclassify.hpp> header (!1686)
Replace boost::regex with std::regex (!1676)
Update SDC scheme for implicit PFASST (!1659)
Pre-allocate memory for GMRES (!1668)
Update hdf5 read to only read in selected elements to reduce memory overhead (!1351)
Remove arbitrary factor in  GlobalLinSysIterative.cpp (!1694)
Some tidy-up in LinearAlgebra (!1699)
Some further tidy-up in LinearAlgebra (!1700)
Updated hdf5 to 1.12.3 (!1696)
Remove redundant tolerance limiter in GMRES (!1707)
Remove unused tolerance parameter in NekSys class and subclasses (1708)
Avoid repeatly operator assignment in NekNonlinSysNewton class (!1709)
Add an exact solution for GetLocCoords of straight-edge quad elements (!1704)
Add sliding mesh capability (!1605)
Remove MaxIterations parameter from AssemblyMap (!1710)
Consistently use relative tolerance for GMRES (!1706)
Fix use of absolute tolerance for iterative solvers (!1711)
Move solver info loading form NekSys (and its derived classes) to the callers (!1716)
Tidy physderiv and helmholtz in MatrixFreeOps (!1653)
Remove time estimation for Parareal and PFASST drivers (!1691)
Tidy and clarify implementation of Dirichlet boundary condition in GlobalLinSys (!1724)
Remove unused file NekLinAlgAlgorithms.hpp (!1728)

ADRSolver

Add support for spatially-constant, but variable direction, diffusion to
ADRSolver. (!1669)
Inline Vmath library (!1667)
Refactor UnsteadyReactionDiffusion as a subclass of UnsteadyDiffusion (!1713)
Tidy-up ADRSolver (!1715)
Refactor UnsteadyAdvectionDiffusion as a subclass of UnsteadyAdvection (!1720)
Update UnsteadyReactionDiffusion solver for explicit time-stepping (!1731)
Refactor UnsteadyViscousBurgers as a subclass of UnsteadyInviscidBurgers solver (!1718)

CardiacEPSolver

Fix cell model history point filter output after base class change (!1342)
Add const qualifier to SetUniversalUniqueMap (!1644)
Add safety check for FinTime parameter for parallel-in-time (!1652)

IncNavierStokesSolver

Save BndElmtExpansion and avoid re-building (!1648)
Add Simo-advection and a switch for Simo-/Dong-advection to VCSImplicit (!1630)
Add a new feature of elasticaly mounted object using the moving reference frame (!1495)
Some tidy-up (!1693)
Fix memory leak in VCSImplicit due to matrix updating (!1688)
Rename Simo-/Dong-advection to Extrapolated/Updated respectively for VCSImplicit (!1717)
Update test for SuccessiveRHS parameter (!1727)
Fix segmentation error in IncNavierStokesSolver when AeroForces filter is used (!1726)
Added Examples in solvers/IncNavierStokesSolver/Examples, matching with the user-guide (!1723)
Extend support for IO timer levels to IncNavierStokesSolver (!1732)
Fixed issue with substepping when using mixed BCs (!1639)

CompressibleFlowSolver

Add three subsonic inflow boundary conditions: EnforceEntropyPresure, EnforceEntropyVelocity, and EnforceEntropyTotalEnthalpy (!1398)
Update implicit solver for implicit PFASST (!1659)
Some tidy-up in the compressible flow solver (!1698)
Fix ESDIRK scheme for compressible flow solver (!1690)
Some further tidy-up in compressible flow solver (!1700)

Documentation

Update instructions for VS2022 (!1714)
Update ADRSolver user guide (!1730)

ShallowWaterSolver

Reduce memory footprint of the Peregrine solver(!1680)
Fix Peregrine solver for Parareal output(!1689)

FieldConvert

Fix typo in user-guide and fix but for parallel-in-time FieldConvert (!1645)
Fixed FieldConvert -m addfld (!1500)
Add a new FieldConvert module to zero a plane in wavespace (!1632)
Fix tecplot output for line and plane points (!1497)

CI

Disable macOS Intel runner (!1655)
Upgrade Win10 runners (!1656)
Add clang-tidy support to CI for static analysis (!1556)
Remove some uncompiled files and add quality step to check (!1672)
Add clang-15 tester (!1671)
Update performance tests to use minimum execution time (!1733)
Fix missing dependencies for clang-tidy and uncompiled-files jobs (!1736)

NekMesh

Replace deprecated boost::filesystem functions (!1654)
Remove deprecated AddTraceIntegral interface from ExpList.h (!1646)

Packaging

Remove unnecessary Boost dependencies after C++17 migration (!1734)

Miscellaneous

Add a particle tracker utilitiy using equation system infrastructure (!1310)
Remove deprecated fs::copy_directory function call (!1662)
Added a sample python script for wallnormaldata module (!1663)
Replace boost::lexical_cast with std::to_string for integer variable (!1677)
Use [[maybe_unused]] attribute in solvers (!1683)
Use [[maybe_unused]] attribute in library (!1684)
Fix sse2 SIMD bug (!1559)
Improved the Incompressible NS section of User-guide (!1719)


v5.4.0
Library


Add unit tests for Polylib (!1533)


Add the absolution tolerance for the iterative linear system solver (!1549)


Redesign of Parareal driver (!1509)


Add PFASST driver (!1501)


Add local p-refinement functionality (!1508)


Tidy-up SDC schemes (!1550)


Add min/max and fmin/fmax function to the interpretor registry (!1552)


Fix a _m128d to _m128i conversion bug in sse2.hpp (!1551)


Register TimeIntegrationMethod to SessionReader (!1539)


Remove unecessary for loop in NekLinSysIterGMRES (!1554)


Generalize the use of size_t in TimeIntegration (!1555)


Fix convergence error in Fixed-point Jacobi algorithm (!1561)


Tidy-up NekLinSys (!1562)


Tidy-up TimeIntegration (!1505)


Fix Adams-Bashforth time integration scheme (!1558)


Remove unused Kernel directory (!1560)


Remove unused files in BasicUtils (!1564)


Fix convergence error in Fixed-point Jacobi algorithm (!1561)


Update parallel-in-time code base in fieldconvert (!1565)


Tidy-up Basis and Points classes (!1568)


Remove unused function GetKey in NekFactory (!1567)


Add new functionality and code improvements for the local p-refinement (!1571)


Fix v_Exscan compilation bug (!1566)


Tidy-up of comm class (!1572)


Tidy-up Nektar tolerances (!1570)


Tidy-up UnsteadySystem (!1579)


Fix StaticCond approach + GMRES when restarting (!1583)


Tidy-up NekManager (!1587)


Slightly reduce memory allocation in GMRES (!1586)


Tidy-up Advection class (!1580)


Tidy-up diffusion class and subclasses (!1581)


Tidy-up NekNonlinSys and fix some issues (!1563)


Avoid pre-allocating memory in GMRES (!1591)


Added a local space version of GMRES and ConjugateGradient (!1575)


Added a jacobi preconditioner building on diagonal impelemtation (!1575)


Add a priori convergence and null-input check to GMRES (!1590)


Some tidy-up in StdRegions (!1595)


Tidy-up/removed unused Lapack function definition (!1573)


Some Tidy-up in MatrixFreeOps (!1599)


Accelerate interpolation for regular and straight-edge elements (!1283)


Fix an indexing error in MatrixFreeOps (!1602)


Update Session File for Parallel-in-Time (!1516)


Partially fix hdf5 partition for Parareal (!1611)


Update Collection for Parareal-in-Time (!1607)


New version of CreateCollection using basisKey (!1603)


Remove unused Domain.cpp and Domain.h file (!1609)


Remove useless ReadExpressions and SubstituteExpressions function in sessionReader (!1608)


Corrected workspace size in triangle BwdTrans (!1610)


Reactivate Reactivate Movement_fixed_3D_stacked_cylinders_curved_hdf5_par test except on ARM MacOS (!1536)


Updated the PETSc version to v3.19.3 for THIRDPARTY_USE_PETSC, enabled local PETSc version usage (!1618)


Rename communicator in LinearAlgebra (!1612)


Add IProductWRTDerivBase operator for 3DH1D problems (!1483)


Full support of mixed-order elements in DG (!1606)


Refactoring collections for allowing variable output size inside the collections' operators, introduced PhysInterp1DScaled in Collections (!1620)


Use default keyword for destructor in Driver (!1624)


Add additional test for SDC time-integration(!1621)


Fix to compiler flags for MSVC (!1604)


Correct bug in scotch initialisation for substructuring (!1634)


Add ability to build up Movement objects programmatically (!1600)


Write out movement data to XML files (!1600)


CompressibleFlowSolver

Fix AUSM3 Riemann solver and add tests to the CI (!1537)
Set initial condition check points files to zero (0) (!1535)
Prevent file overwrite with restart for the Compressible flow solver (!1540)
Register Projection and GJPStabilisation in SessionReader (!1542)
Redesign of AUSM Riemann solver class (!1577)
Redesign of the compressible flow solver. Removal of RinglebFlow and IsentropicVortex subclasses (!1584)
Redesign of PreconCfs class (!1578)
Fix virtual functions in ContField class (!1616)
Tidy-up Compressible flow solver print status (!1615)
Update of for parallel-in-time (!1589)
Fix some memory bugs for implicit compressible flow solver with LDGNS (!1617)

IncNavierStokesSolver

Add an option to mask variables for the linear stability problem (!1280)

ShallowWaterSolver

Fix NonlinearPeregrine solver due to a change of API (!1637)

FieldConvert

Add option to use .csv files in pointdatatofld module (!1545)
Add a new module to output power spectral in a given area (!1271)
Add a new module to do field averaging (!1271)

IncNavierStokesSolver

Register SolverType in SessionReader (!1541)
Prevent file overwrite with restart for the IsentropicVortex solver (!1543)
Fix GJP stabilisation for curved 3D elements (!1593)
Enable SVV and GJP stabilisation for unresolved scales in VCSImplicit (!1592)
Fix tolerance in KovaFlow_m10_VCSImplicit_SVV (!1619)

Miscellaneous

Fix compilation against TetGen 1.6 (!1547)
Tidy-up Parareal initial condition output (!1534)
Remove double entry in documentation and slightly tidy-up code (!1530)
Fixed deadlock problem for the LowEnergyBlock preconditioner which appeared for specific combinations of meshes and boundary conditions (!1553)
Add a check to avoid unnecessary copy in DoOdoProjecton function (!1582)
Update user guide and developer guide (!1598)
Some various tidy-up (!1585)
Added support for performance tests (!1614)
Integrated performance tests into the CI system and enabled a test (!1629)
Added additional performance tests and updated test documentation (!1631)
Fix VmathTimer compilation error (!1635)
Fix SIMD compilation error (!1636)
Update ShallowWaterSolver performance test (!1643)

NekMesh

Changed CMake to set NEKTAR_USE_THREAD_SAFETY to ON when MeshGen is set to ON (!1546)
Fix VarOpti Tolerances (!1569)
Fixed a bug where MeshElement/Tetrahedron did not assign edge IDs in the constructor (!1596)
Reduce VarOpti memory usage by removing the storage for GetFunctional in NodeOpti (!1633)

Documentation

Fix missing Tikz external package requires for bookworm (!1638)

CI

Add testing and packaging for Debian bookworm (!1638)
Added a NekMesh docker image and added the image to the CI (!1641)
NekPy

Add bindings for Movement-related classes (!1600)
Add bindings for various helpful methods in the SpatialDomains
library (!1600)


v5.3.0
Library

Fixed avx512 back-end for SimdLib (!1333)
Remove unnecessary IterPerExp methods (!1366)
Added float to scalar and avx2 back-end, disable avx512, sse2, sve (!1255)
Updated the library to use m_phys and m_coeff as function arguments (!1412)
Added float and restored SVE back-end for SimdLib (!1373)
Fix VmathSIMD by adding optional mapping with # of lanes (!1388)
Added float and restore avx512 back-end for SimdLib (!1387)
Fix namespace pollution which causes boost 1.74+ errors (!1389)
Fix missing copy assignment operator warnings in clang 13+ (!1391)
Added checkpoint file writing start time in the checkpoint filter (!1401)
Fix boost 1.77 compatibility errors (!1420)
Replaced depricated "sprintf" with "std::to_string" (!1406)
Add compatiblity patch to solve conflict between flex 2.6.3 and scotch 6.0.4 (!1410)
Add Parareal Driver module (!1317)
Maintenance for C++-17 compatibility: removed std::unaray_function base class due to removal from the std (!1419)
Fixed the comment of function Vvtvvtp in VmathArray (!1408)
Add a FieldConvert utility to compute the divergence of the velocity (!1413)
Added new filter to calculate variables integral on composite mesh (!1409)
Overload PhysEvaluate to give first derivatives using barycentric
interpolation (!1323)
Non-conformal interface support (!1323)
Fix a I/O issue related to the IO_InfoSteps parameter (!1422)
Fix a I/O issue related to the IO_CheckSteps parameter (!1423)
Fix boost 1.77 compatibility errors (!1402)
Replaced depricated "sprintf" with "std::to_string" (!1406)
Add compatiblity patch to solve conflict between flex 2.6.3 and scotch 6.0.4 (!1410)
Templating FieldUtils::Interpolator class (!1420)
Fix virtual function overrides in StdRegions and LocalRegions classes (!1435)
Disable -Werror by default (!1443)
Add missing override keyword to virtual functions in FieldUtils (!1452)
Add override keyword to virtual functions in GlobalMapping and MultiRegions (!1450)
Add fmod and modulus operator to interpreter (!1089)
Add command line option and environment variable to disable backup field files (!1154)
Add override keyword to virtual functions in SpatialDomains (!1448)
Add missing override keyword to virtual functions in Collections (!1453)
Update tutorial submodule (!1511)
Add missing override keyword to virtual functions in SolverUtils (!1451)
Add missing override keyword to virtual functions in LibUtilities (!1459)
Enable ARM macOS runner, fixes for SCOTCH allocation and PETSc detection on macOS (!1462)
Add FieldConvert module and filter to project velocity into body-fitted coordinate system (!1467)
Add Curl operator to ExpList (!1475)
Changed LinearAdvectionDiffusionReactionSolve arguments to be equivalent to HelmSolve (!1475)
Added detection for advection matrices in GlobalLinSysIterative with silent switch from CG to GMRES (!1475)
Added non-symmetric laplacian matrices via varcoeffs (!1475)
Added matrix-free operator for LinearAdvection (!1475)
Fix uninitialized coordinates in the Bodyforcing (!1472)
Fix body-fitted velocity filter and also record the max/min for density,pressure, and temperature field (!1490)
Fix typos in Vmath and VDmath (!1480)
Fix minor typo and removed unused functions in LibUtilities/TimeIntegration (!1476)
Fix RK5 time integration scheme (!1482)
Fix fld file import for SingleMode expansion (!1487)
Fix ESDIRK time integration scheme (!1484)
Fix IMXGear time-integration scheme for consistent second-order accuracy (!1489)
Fix ESDIRK time integration scheme (!1484)
Fix TimeIntegrationDemo.cpp and add ESDIRK tst files to the CI (!1485)
Add DIRKOrder1, BDFImplicitOrder3, BDFImplicitOrder4, RungeKutta1, and RungeKutta3 schemes to the register (!1485)
Use DIRK (instead of IMEXdirk) schemes for the start-up phase of high-order BDF and AM schemes (!1485).
Fix IMEXdirk_1_2_2 and IMEXdirk_2_3_3 time-integration schemes (!1499)
Add extrapolation time-integration scheme (!1488)
Fix CNAB/MCNAB time-integration schemes (!1493)
Slightly tidy-up time integration algorithms (!1496)
Reduced memory usage in the FilterHistoryPoint (!1458)
Remove redundant functor typedef (!1498)
Add missing m_ prefix to member variables in FFTW (!1504)
Make some virtual functions protected (!1506)
Remove trailing CONDITIONS tag in xml files (!1510)
Disable problematic Movement_fixed_3D_stacked_cylinders_curved_hdf5_par test (!1507)
Fix I/O issue related to Hdf5 that was unable to open file and fixed similar issue in other IO classes in BasicUtils (!1512)
Remove unused function SetUpXmlDoc (!1513)
Add new interpolation function to FieldUtils (!1514)
Generalize the use of the space communicator (!1518)
Add parallel-in-time feature to FieldConvert (!1520)
Add Spectral Deferred Correction (SDC) time integration schemes (!1481)
Redesign of Spectral Deferred Correction (SDC) algorithm (!1523)
Modify SessionReader to read restart/exact solution files parallel-in-time (!1521)
Fix Polylib_test.cpp (!1524)
Update to Parareal file output (!1517)
Add convergence criteria to Parareal driver (!1457)
Add time metadata to tecplot output (!1525)
Fix segmentation fault when no time integration method specified for unsteady problem (!1526)
Set adjacent elements for m_bndcondExpansions for both CG and DG (!1491)
Fix inconsisten treatment of 1D and 2D/3D expansions in DisContField::v_GetBoundaryToElmtMap (!1491)
Tidy-up parallel-in-time processing in FieldConvert (!1529)

Python

Add wrappers for Interpreter and Equation classes (!1329)

CompressibleFlowSolver

Added Laplacian (NonSmooth) AV to the explicit Navier Stokes solver (!1372)
Added Physical AV to the implicit Navier Stokes solver (!1372)
Fixed Segmentation Fault when using C0 Smoother with Shock Capturing (!1394)
The Incomplete IP method was made the default method for the IP method (!1377).
Add additional parameters for the Isentropic Vortex equation system (!1323)
Improve performance of the perconditioner and diffusion operator (!1393)
Re-add the SFD test with an updated restart file (!1399)
Improve performance of the block diagonal operator of the preconditioner (!1404)
ExtractSurface2DCSF utility is updated to use the boost program option (!1407)
Fix a Wuninitialized-const-reference warning (!1449)
New implementation of the Stagnation Inflow Boundary Condition (!1478)
Remove m_root in PreconCfs to avoid possible future conflict with parallel-in-time driver (!1515)
Update to Parareal file output (!1517)

CardiacEPSolver

Fix a shadowed loop counter variable in the benchmark filter (!1436)
Update functions in derived classes to be consistent with the base class and add override keyword to virtual functions (!1439)
Add dummy projection to CardiacEPSolver (!1527)

IncNavierStokesSolver

Replaced depricated "sprintf" with "std::to_string" (!1406)
Extended Reynolds Stresses filter to passive scalars (!1430)
Added Implicit Solver (!1475)
Fixed Taylor-Hood expansion for VCSWeakPressure (!1444)
Fix filename in LinearisedAdvection (!1479)
Added scalar advection terms to AdjointSolver (!1466)
Remove member variables as funtion parameters in LinearisedAdvection solver (!1522)

VortexWaveInteractionSolver

Replaced depricated "sprintf" with "std::to_string" (!1406)

DummySolver

Fix CWIPI test to use DirectFull for projection of received data (!1502)

NekMesh

Replace VTK pointers with VTK smart-pointers to avoid memory leaking, when
exporting in .vtu format (!1386)
Preserve CAD face labels and save in to session file as a "NAME=" tag on the composites (!1396)
Fix a header include which caused compilation errors on OCC versions newer than v7.4 (!1395)
Add option to refine curves in the same manner as the line refinement functionality (!1298)
Add refined curves and refined lines now prompt the octree to subdivide until the desired refined delta is reached (!1298)
Fix a segmentation fault with WriteOctree due to missing 'order' parameter (!1418)
Multi domain input/output for Nekpp and HDF5 file formats (!1323)
Fix CADSurfOCE curvature bug where negative curvature values could be returned causing incorrect mesh spacing (!1442)
Fix ProjectCAD bug with findAndProject where the projection was missing and variable was passed without reference (!1442)
Fix 3d_bl_wing test case for STEP files where the wrong surfaces were selected for the BL (!1442)
Fix error when setting BL progression to 1.0 due a division by 0 (!1455)
Changed the BOOLPARAMETERS tag in InputMCF to allow disabling the high order
surface optimisation with "DisableSurfaceOptimiser" (surface optimisation is
still enabled by default) (!1455)
Fix 3d_bl_wing test case for STEP files - updated to use an improved CAD definition for the NACA aerofoil (!1486)

FieldConvert

Add vars and dirs options in the gradient module to specify fields and partial derivative directions (!1415)
Fix range option so that it also works with hdf5 (!1414)
Fix halfmodetofourier module with triangles (!1492)
Fix the output field names of WSS module of FieldConvert, revert !1352 (!1528)

Miscellaneous

Updated gitignore to be friendly with CLion IDE (!1405)
Correct header section of .cpp, .hpp, and .h files (!1426)
Linux format .cpp, .hpp, and .h files (!1432)
Fix wsign compare warning (!1437)
Fix some Woverloaded-virtual warning (!1439)
Add missing override keyword to virtual functions in solvers (!1440)
Fix some Wunused-variable (!1438)
Fix unused parameter warnings in virtual functions (!1441)
Fix a Wreorder warning (!1445)
Fix some Wimplicit-fallthrough warnings (!1446)
Switch to using pkg-config for finding PETSc (!1454)
Use Nektar::LibUtilities::Timer for better accuracy (!1468)
Make some virtual functions protected (!1469)
Extend clang-format checks to solvers, utilities, tests and templates (!1434)
Fix documentation for exponential scheme (!1519)

CI

Enable packaging for Fedora 35, removed Fedora 33/34 from package builds. (!1424)
Add header checking for *.cpp, *.hpp and *.h files to the CI (!1431)
Enable packaging for Fedora 36. (!1429)
Fix XML files indentation (!1428)
Update solvers CMakeList.txt to fix some warnings detection issue (!1447)
Remove -fpermissive from NektarCommon.cmake (!1460)
Remove old distribution versions, added Fedora 35/36 testing to CI (!1461)
Kill orphan Tester-g processes on Windows and remove source tree after build
(!1471)
Fixed path issue and warning in the nektar-workbook image (!1470)


v5.2.0
Library

Add Arm SVE backend to SIMD library (!1282)
Added support for manifold  MatrixFree operators (2D in 3D space) (!1304)
Put in place automatic selection of explicit operations using an opt file (!1304)
Fixed the moving reference frame rotation (Solver Utils) (!1305)
Revised FilterAeroForces to accout for the moving reference frame (!1305)
Add MaxMinFields filter to record the max/min at each quadrature point and output the max/min fields. (!1256)
Simplify the logic in the MPI pairwise trace exchange (!1307)
Fix imaginary mode in HalfModeToFourier module (!1247)
Added a dummy output module OutputStdOut for NekMesh utilities that don't require an output file (!1318)
Fix compiler errors on ARCHER2 using PrgEnv-cray (!1315)
Fix cmake SIMD enable/disable options based on architecture (!1320)
Restrucutred the communicators to reduce direct dependence on session file communicator (!1337)
Fixed SIMD mask test (!1324)
Fix memory leak in Timer.cpp (!1330)
Fix cmake CWIPI option to remove Fortran check (!1331)
Fix excessive verbose output in GetBndElmtExpansions method (!1341)
Timer class was updated with safety checks to avoid wrong measurements (!1347)
Fix to adjust for warnings/errors from Monterey updated compiler (!1355)
Update nektar and nektar-env packages to Debian Bullseye (!1356)
Reformat code with clang-format (!1359)
Remove unnecessary IterPerExp methods (!1366)
Fix erronous call to FwdTrans from MR 1366 (!1374)
Fixed avx512 back-end for SimdLib (!1333)
Added float to scalar and avx2 back-end, disable avx512, sse2, sve (!1255)
Change MPI initialisation to allow MPI_Init call outside Nektar++ (!1376)
Fixed incorrect summary output for diffusion/reaction terms (!1383)

FieldConvert

Add calculation of CFL number for the incompressilbe flow (!1332)
Added conditional to select the eNearestNeighbour method for 3D interpolation (!1335)
Fixed the output field names of WSS module of FieldConvert (!1352)
Add VTU output using VTK library (high-order & multi-block options) (!1343)

IncNavierStokesSolver

Added Boundary conditions for moving reference frame (!1305)
Added the virtual functions overwriting the FluidInterface for moving reference frame (!1305)
Add Gradient Jump Penalty (GJP) Stabilisation into the solver (!1290)
Equation types are registered to the session reader (!1344)
Added Block-Preconditioner for Full Matrix solve (!1350)
Update to Parareal file output (!1517)

ADRSolver:

Add Gradient Jump Penalty (GJP) Stabilisation into the Unsteady Advection and Unsteady Advection Diffusion solvers (!1290)

PulseWaveSolver

Parallelised solver (!1337)

NekMesh

Allow for one or more blank lines between sections in Tecplot ascii (.dat) files (!1322)
Small bug-fix for Python API for unused configuration options (!1348)
Fix bug in ProcessVarOpti/ElUtil for segfault on non-tri or tet meshes (!1381)

CompressibleFlowSolver

Added physical AV, dilatation sensor, Ducros's and smoothing (!1180)
Added timers around important functions using the Timer class. Timers are available by specifying IO_Timer_Level > -1 (!1347)
Fixed bug in the calculation of the discontinuity penalty factor for the DiffusionIP implementation (!1368)

Documentation

Fix images not being displayed in HTML documentation and tutorials (!1370)

CI

Remove unused build options (!1360)
Enable NEKTAR_USE_VTK across full builds and in docker image (!1358)
Add XML linting and checking in CI pipeline (!1433)

Packaging

Fix various issues with debian unstable and centos8 packaging (!1362)
Fix missing texlive package dependency for centos packaging (!1382)


v5.1.1
Library

Fix a boost headers incompatibility with boost-1.77 (!1297)
Add RungeKutta4 as an alternate name for ClassicalRungeKutta4 for time integration method (!1294)

Python

Fix initialisation warning when using HDF5 (!1299)
Fix issue with implementation of Diffusion IP (!1303)
Split Helmholtz MatrixFree operator to improve compile times (!1292)
Fix Boost deprecated header warnings (!1302)
Add command lines to set starting time and starting checkpoint number of a time-dependent simulation (!1309)
Fix an index referencing error in the Collections PhysDeriv method for Hex (!1314)

Python

Updates to workbook, fix bugs in StdExpansion and SessionReader with MPI communication being recreated. (!1296)

BuildSystem

Updated third party Lapack version 3.7.1 (!1312)

CompressibleFlowSolver

Fix non-dimensional Sutherland law (!1253)


v5.1.0
Library

Restructure library to use local coefficient storage down to the GlobalLinSys
level. Removed GlobalCoeffs functionality (!963, !1145)
Corrected the use of communicator in AssemblyMapDG and AssemblyCommDG which
was not using GetRowComm() (!1144)
Add interior penalty method to DG framework (!1101)
Add an error filter for the time-evolution of the L2 and Linf errors (!1147)
Fix successiveRHS method (!1176)
Add cachedId in GetExpIndex and use in Fieldconvert (!1167)
Fix bug in PreconditionerLowEnergy (!1161)
Fix intel c compiler error in AeroFilters (!1198)
Fix compilation errors when CWIPI interface enabled (!1207)
Fix distance in ContainsPoint and GetLocCoords (!1200)
Fix compiler warning of maybe-uninitialized elType in InputStar (!1217)
Extend vectoisation to include all elements and initialise collections on first call (!1162)
Add vectorisation of most element on basix operations (!1158)
Add constant coefficients to matrix-free Helmholtz operator (!1284)
Limit MPI methods based on core count (!1208)
Split out IProduct.cpp and IProductWRTDerivBase.cpp in order to avoid long time compilations (!1228)
Refactored time integration code using factory pattern (!1034, !1103)
Fix WriteStream with empty Array/vector (!1233)
Add interpolation at arbitrary point in 3DH1 (!1233)
level. Removed GlobalCoeffs functionality (!963, !1159)
Add interior penalty method to DG framework (!1101)
Add an error filter for the time-evolution of the L2 and Linf errors (!1147)
Enable global systems to be generated when using different values of variable
coefficients (!1159)

FieldConvert

Refactored time integration code using factory pattern (!1034)
Fix to preprocessor logic for boost with Visual Studio >= 2015 (!1115)
Fix type consistency and real comparison in SharedArray.hpp, replaced
num_elements with size() (!1127, !1137, !1141)
Use base MPI functions instead of the GS library in the trace exchange
for parallel DG simulations (!1112)
Replace PhysIntegral with Integral (!1246)
Change the way periodic boundary conditions in parallel is setup to reduce excessive memory usage (!1235) (!1289)
Add exponential and fractional-in-time integration schemes (!1106, !1111, !1210)
Add nonlinear and linear system solvers (!1196)
Add ESDIRK3 and ESDIRK4 time integration schemes (!1196)
Add a filter to calculate mean value of solution fields (!1211)
Fix the time dependent absorption forcing (!1254)
Enable very high order (>100) quadrature use (!1262)
Add rotation and improve performance of MovingReferenceFrame forcing (!1185)
Fix BODYFORCE defined by a file (!1215, !1264)
Add multi-level partitioning strategy for HDF5 geometry (!1209)
Fix the URL of ccmio library (!1288)

FieldConvert:

Add phifile module to compute shape functions for the SPM solver (!1065)
Fix mean and innerProduct modules in 3DH1D cases (!1157)
Add Python interface (!1081)
Fix wss module with nparts option and reading of parallel xml files when the root partition is missing(!1197)
Fix a segment error in the gradient module when the number of fields is smaller than space dimension(!1216)
Add output of wall normal data from a single point (!1237)
Add QCriterion for 2D flow (!1243)
Fix to interppointsdatatofld to allow for mpi processing of large files (!1191)
Fix the logic of C0Projection:helmsmoothing (!1220)
Fix extract module for boundaries with periodic boundary conditions (!1277)

IncNavierStokesSolver:

Add MaxMinFields filter to record the max/min at each quadrature point and output the max/min fields. (!1256)
Fix imaginary mode in HalfModeToFourier module (!1247)

CardiacEPSolver

Added additional parameter sets to Fenton-Karma model (!1119)
Fix electrogram calculation in 1D/2D domains (!1285)

IncNavierStokesSolver

Add Smoothed Profile Method (SPM) for the formulation of immersed boundaries
(!1065)
Add new filter AeroForcesSPM to compute aerodynamic forces in immersed
boundaries (!1065)
Add mask function and more baseflow parameters for the linear stability problem (!1201)
Fix dudt in high-order pressure boundary condition (!1190)
Add flow rate forcing with a scalar (!1026)

CompressibleFlowSolver

Added the selective frequency damping support for the implicit solver (!!1267)
Added vectorisation of the Interior Penalty method (!!223)
Added a simplified implicit solver with naive preconditioner (!!1196)
Add BRJ preconditioner to the implicit solver (!!1212)
Fix implicit solver for Euler system (!!1252)
Updated WallAdiabatic/WallViscous BC to accept time-dependent perturbations on the ghost state (!1248)

PulseWaveSolver

Added viscoelasticity (!1138)
Added empirical and power laws (!1138)
Code tidying (!1138)

Documentation:

Updated Windows source build instructions in user guide (!1152)

Tester

Added test metric to check if warnings appear in output and error stream (!1225)

NekMesh

Improved boundary layer splitting and output to CADfix (!938)
Improve .geo reader and support 3D geometries with voids (!1031)
Added r-adaptation code (!1109)
Added Python bindings, change NekMeshUtils to NekMesh (!1149)
Added pyramid element for the Star-CCM mesh (!1229)
Added option to use absolute tolerance in peralign (!1225)

BuildSystem

Toggle build type (!1135)
Updated minimum required CMake version to 3.5.1 (!1152)
Updated third party Boost version 1.71 (!1152)
Updated third party OCE version to 0.18.3 (!1234)


v5.0.3
CompressibleFlowSolver

Fix repeated output of u,v,w for Euler system

FieldConvert

Fix the Filters output files numbering (!1251, !1261)
Fix the Filters output files numbering (!1251)
Fix 2D surfDistance calculation (!1263)

NekMesh

Fix VTK Output for 3D meshes and support XML format (!1258)

Documentation

Fix documentation to note restrictions on use of coupled solver (!1268)
Library

Add robustness to the read expansions (!1239)


v5.0.2
Library

Fix bug in StdHexExp FillMode (!1192)

Documentation

Updated Documentation to include HDF5 Mesh Output (!1230)
Removed Ubuntu Trusty (14.04) from CI and added Focal (20.04) (!1238)

CI

Add Debian Bullseye to CI system (!1181)

BuildSystem

Updated third party zlib version to 1.2.9 to resolve OCE source build issue (!1227)
Adding SolverUtils as a core library that is built by default (!1240)


v5.0.1
Library

Fix incorrect coordinate dimension used in history point filter (!1118)
Fix compile errors with GCC 9.x (!1108)
Correct the Energy/Enstropy integral for the 3DH1 flow (!1132)
Added IsRealEqual method to compare real numbers with relative tolerance.
Started using it in SharedArray and in NekMesh to fix peralign-extrude tool
chain (!1134)
Fix performance of GetExp(coord) by using octree lookup (!1165)
Fix Collection unit tests (!1160)
Fix periodic boundary conditions with HDF5 input file (!1163)
Fix DESTDIR issues for MacPorts (!1179)
Fix Bodyforcing and history point filter bounds issue (!1184)

IncNavierStokesSolver

Change the baseflow time in the Adjoint advection (!1133)

FieldConvert

Fix OutputTecplot skipping final plane in 3DH1D (!1016)
Fix Interppoints in 3DH1D (!1140)

NekMesh

Fix compile errors when using intel cc (!1114)

Documentation

Fix error in compilation of developer guide (!1136)

CI

Added checked conversion from double to int in SessionReader (!1113)
Switched to Gitlab CI (!1120, !1120, !1128, !1129, !1131, !1141)
Updated bullseye build to remove UCX components (!1203)


v5.0.0
Library

Added in sum factorisation version for pyramid expansions and orthogonal
expansion in pyramids (!750)
Added detection of 'abort' file to cleanly terminate simulation early (!772)
Significant overhaul of CMake infrastructure (!770, !804)
Fix ThridpartyCCM options (!802)
Fix Windows CRLF tokens in GEO reader and improve comment handling (!805)
Use chrono in Timer (!807)
Fix caching of FUNCTION tags that read from file and provide the same
functionality in FUNCTIONs defined for forcings (!759)
Transition to C++11 (!795, !847)
Add patch to tinyxml to fix size_t vs int bug (!820, !1006)
Add ARPACK thirdparty build capabilities (!828)
Added native support for csv files in addititon to pts (!760, !835, !906)
Utilize LAPACK_DIR env variable to find the native blas/lapack install (!827)
Extend AeroForces filter to compressible flows (!815)
Remove StdExpansion use from MultiRegion (use Expansions instead). (!831)
Move steady state check and CFL output from solvers to SolverUtils (!832)
Remove DG advection implementation from EquationSystem (!832)
Simplify RawType typedefs (!840)
Remove unused files from BasicUtils (!841)
Remove checks for old boost versions which are no longer supported (!841)
Refactor ParseUtils to be more consistent (!843, !896, !908)
Added support for using the distance to a specific region (e.g. outlet) in the
function definitions for the Absorption Forcing (!769)
Improve performance of DisContField2D::v_ExtractTracePhys (!824)
Fix small bug in Jacobian Energy (!857)
fix variable name overriding in file functions (!870)
Adds CFI CAD engine back-end (!864)
Adds CFI Mesh IO support (!864)
Cleanup of CAD system data structures (!864)
Fix mac OSX on buildbots (!876)
Fix error from (!826) (!876)
Fix minor bug in ARPACK thirdparty build cmake (!874)
Added in sum factorisation version for pyramid expnasions and orthogonal
expansion in pyramids (!750)
Adjust boost third-party compilation to account for different toolset
choices (!886)
Switch MeshGraph to use factory pattern and add HDF5 geometry support (!900,
!904, !941)
Restructure the low energy preconditioner to handle pyramidic and variable
p expansions (!920)
Remove requirement for modmetis, switch to SCOTCH by default (!899)
Switch MeshGraph to use factory pattern and add HDF5 geometry support
(!900, !904)
Fix bug in MeshPartition.cpp which caused incorrect array access when
WeightPartitions was used in parallel (!923)
Removed instance count from beginning of Array storage to improve memory
alignment (!921)
Fix naming issue of duplicate Unit tests (!924)
Fix warnings about missing virtual destructors in abstract classes (!932)
Fix ability to have periodic boundary conditions that are aligned by a
rotation rather than just a translation (!933)
Added a coupling interface to exchange data between solvers at run time
and a DummySolver to test the implementations (!853, !931, !950, !973, !1017)
Fix compilation issue with newer Boost versions and clang (!940)
If only NEKTAR_BUILD_LIBRARY is enabled, only libraries up to and including
MultiRegions will be built by default (!945)
Dont add doxygen documentation to the all target (!834)
Fix missing metadata import from Hdf5 files (!971)
Fix missing flags for periodic BC in DiffusionLDG (!985)
Add the moving reference frame as a forcing (!987)
Added rtree for element bounding box lookup to accelerate interpolation (!996,
!1066)
Fix integration weights on prisms and pyramids if not using the default
integration rule (!998)
Fix missing ContainsPoint in Pyramid expansion (!1000)
Added path prefixes to find packaged Scotch (!979, !1008)
Add HDF5 geometry format (!977)
Combine and generalise demo code in StdRegions and LocalRegions (!993)
Fix for error output to allow for custom error streams (!944)
Fixed bug in ReOrientQuadFacePhysMap (!1003)
Add NekPy Python interface (!962, !990, !989, !1004, !1014, !1061, !1070)
Fix edge case for ThirdPartyScotch and FindScoth (!1009)
Fix to populate m_elmtToExpId map if not already set up in GetExpIndex (!1019)
Added flag to skip periodic BCs while filling Dirichlet BCs in
ContField3D.cpp (!1018)
Fix bounding box for interpolation (!1033)
Added IMEXOrder4, RK5 and AB4 time integration schemes (!1037)
Fix TriExp.cpp orientation bug (!1048)
Fix XML attributes in conditions.cpp to be unordered (!1015)
Fix issue with HDF5 mesh input in serial (!1049)
Add estimate of filters CPU time (!1044)
Update CompressibleFlowSolver/Examples/Test_IsentropicVortex1.xml example (!1045)
Add error if HDG used with periodic BCs (!1071)
Fix issues related to leading factors, arithmetic order and associativity of
exponential operator in expression evaluator (!1066)
Remove use of using namespace std in header files (!1066)
Add error messages for use of ARPACK in serial (!1079)
Generalise ContainsPoint routine (!1078)
Homogenized fallthrough to fix issues with gcc 7.4.0 (!1084)

NekMesh:

Add feature to read basic 2D geo files as CAD (!731)
Add periodic boundary condition meshing in 2D (!733)
Adjust boundary layer thickness in corners in 2D (!739)
Add non-O BL meshing in 2D (!757)
Add ability to compile CCIO library but tar file is not yet openly
available whist we seek permission from Simens (!799)
Fix issue with reading CCM files due to definition of default arrays
rather than a vector (!797)
Fix inverted triangles and small memory issue in surface meshing (!798)
Update for the CAD system, more advance self-healing and analysis (!822)
Additional curve types in GEO reader: BSpline, Circle, Ellipse (!800)
Fix default command line argument value (!823)
Add projection meshing module which can curve linear meshes with CAD (!826)
XML meshes now write with provenance information, including information about
their source, for debugging purposes (!872)
Force 3-node loops to avoid degenerate 1-triangle faces (!875)
Smooth BL normals in 2D when normals intersect or cause invalid macro BL
elements (!877)
Revert triangle code to ThirdParty library (!883)
Fix coinciding nodes issue with very fine meshes (!883)
Skip CFI groups of bodies and non-numbered nodes (!891)
Add ability to space out 2D BL nodes to better fit local target Delta (!890)
Fix automatic peralign call in 2D periodic meshing (!888)
Fix BL splitting call from MCF (!910)
Support CFI combined lines (!917)
Order nodes in Gmsh output (!912)
Fix manifold face curvature nodes (!913)
Fix writing 1D surfaces (!930)
Fix surface string parsin in BL splitting (!937)
Enable use of distributed packages for triangle and TetGen (!953)
Fix issue with MLSC after Scotch conversion (!943)
Add support for Gmsh 4.0 mesh file format (!964)
Fix issue with extracting 1D curved surface from 2D file (!984)
Fix surface extraction, added regression test (!994)
Fix 2D meshing running out of memory due to missing else (!1012)
Add support for .msh v4.1 file input (!1054)
Added penalty term to LDG and LDGNS, slight generalization of LDG (!1080)

FieldConvert:

Add input module for Semtex field files (!777)
Fixed interppoints module (!760)
Fix OutputTecplot in 2DH1D (!818)
Move StreamFunction utility to a FieldConvert module (!809)
Allow using expansion from session file with new --useSessionExpansion
command line option (!842)
Extend wss module to compressible flows (!810)
Allow explicitly setting bool options of FieldConvert modules as false (!811)
Enable output to multiple files (!844)
Allow using xml file without expansion tag in FieldConvert (!849)
Add Lambda 2 vortex detection criteria (!882)
Add module for modifying/adding fields from expressions (!889, !903)
Add module for evaluating the mean of variables on the domain (!894)
Add module for counting the total number of DOF (!948)
Fixed wss module for compressible flows (!958)
Made Sutherland's law non-dimensional (!972)
Add module for removing fields from .fld files (!978)
Fixed nparts option in FieldConvert and automated Info.xml generation (!995)
Added if statement to fix case of 1D/2D manifold interpolation in 1D/2D space,
added check on dimensions for interpolation, fixed seg interp (!999)
Fixed scaling for compressed xml, fixed error printout for mesh only (!1040)
Add field conversion from Halfmode to SingleMode (!1032)
Fix double precision output in .dat format (!1059)
Add phase sampling feature in FilterFieldConvert (!1068)

IncNavierStokesSolver

Replace steady-state check based on difference of norms by check based on
norm of the difference, to be consistent with the compressible solver (!832)
Updated SVV to allow for the DGKernel extension (!851)
Pre-calculate Time invariant portion of Womersley Solution (!814)
Fix for independent setting of SVV in Homogeneous direction (!936)
Write flow field based on CFL threshold (!1025)
Fix unsteady Stokes solver (!1074)

CompressibleFlowSolver

Add 3D regression tests (!567)
Introduce forcing for quasi-1D Euler simulations (!771)
Allow performing axi-symmetric Euler and NS simulations (!771, !866)
Add ability to use an exponential filtering for stabilization with
seg, quad and hex elements (!771, !862)
Fix compressible solver with NUMMODES=1 (!868)
Introduce equations of state to account for real gas effects (!880)
Made Sutherland's law non-dimensional (!972)
Modified pressure outlet BCs to allow for the reference static pressure to be
set from the VALUE fields (!981)
hp scaling for Laplacian AV (!1013)
Removed smooth AV (!1072)

AcousticSolver:

Added two new boundary conditions to the APE system: RiemannInvariantBC
and WhiteNoise (!782)
Store base flow fields in a discontinuous projection (!918)
Enabled 1D cases (!918)
The APE system now uses u_i, c^2 and rho as base flow fields (!918)
Added the Linearized Euler Equations (LEE) (!918)

ADRSolver:

Fix forcing from file for Poisson solver (!1029)

APESolver:

APESolver was replaced with AcousticSolver (!918)

PulseWaveSolver

Added two new boundary conditions: AInflow and UInflow

CardiacEPSolver

Converted FentonKarma model to dimensional form and added variants (!1011)

Documentation:

Added an initial developer's guide (!1001)
Updated user guide to reflect current implementation (!1051)
Added manpages for key solvers and utilities (!1051)

Tester

Fix build with boost 1.67 (!947)
Various change to tests to decrease test time (!1053)
Extend to support MPI tests with multiple executables (!1085)

Packaging:

Add Dockerfiles and gitlab CI configuration for automatic builds (!1021,
!1092, !1098)


v4.4.2
Library

Fix evaluation of points (e.g. HistoryPoints, Interpolation to pts) close to
the interface of two elements (!836)
Fix deadlock in Hdf5 with homogeneous expansions (!858)
Fix a few memory leaks in polylib (!863)
Fix a crash when Interpolator is called on an empty field (!869)
Fix petsc compile without MPI (!873)
Fix calculation of BLPoints (!892)
Fix deadlock in DiffusionLDG (!885)
Fix uninitialised coefficients in DirectFull solver (!898)
Updated PETSc to 3.7.7 (!916)
Fix typecast to an integer which set Lz < 1 to zero when postprocess hdf5 output (!922)
Fix program options errors on Windows in debug mode (!986)
Fix potential clobbered output of ModArnoldi EVs when run in parallel (!983)

IncNavierStokesSolver

Add a test for imaginary shift to be only used with Homogenous and SingleMode on. (!928)

NekMesh

Fix missing periodic boundary meshing and boundary layer mesh adjustment
configurations in 2D (!859)
Fix 2D BL splitting where out-of-plane nodes would be created (!887)

Documentation:

Fix sign of the viscous term in the velocity correction scheme equations in
the user guide (!856)
Fixed anonymous clone URL (!909)
Add information on the limitations of Imaginary Shift for stability. (!928)

FieldConvert

Allow passing input name with trailing separator (!879)
Fix the interpcoord option  of the interppointdatatofld module (!952)

Utilities

Fix VtkToPng to account for deprecated VTK API for VTK version > 8.1 (!925)


v4.4.1
Library

Remove m_offset_elmt_id and GetOffsetElmtId which fixed problems in 2D when
quad elements are listed before tri elements (!758)
Remove the duplicate output of errorutil (!756)
Fix BLAS CMake dependencies (!763)
Fix interpolation issue with Lagrange basis functions (!768)
Fix issue with average fields not working with different polynomial order
fields (!776)
Fix rounding of integer parameters (!774)
Fix Hdf5 output in FilterFieldConvert (!781)
Fixed extreme memory consumption of Interpolator when interpolating from pts
to fld or between different meshes (!783)
Fix deadlock with HDF5 input (!786)
Fix missing entriess in LibUtilities::kPointsTypeStr (!792)
Fix compiler warnings with CommDataType (!793)
Fix ability to set default implementation in Collections and added an option
to set eNoCollections in FieldConvert as default (!789)
Fix performance issue in ProcessIsoContour in relation to memory consumption
(!821)
Fix performance issue with ExtractPhysToBndElmt (!796)
Fix available classes being listed multiple times (!817)
Fix Intel compiler warnings (!837)
Fix overwriting and backup of chk/fld files on slow file systes (!741)
Fix DriverAdaptive with second order IMEX (!850)
Fixed typo in eIMEXGear part (!854)
Added regression tests for IMEXOrder1, IMEXOrder2, IMEXOrder3, MCNAB,
IMEXGear, CNAB, 2nd order IMEX-DIRK, 3rd order IMEX-DIRK (!854)
Fix bug due to subtractive cancellation in polylib routines (!778)

FieldConvert:

Fix issue with field ordering in the interppointdatatofld module (!754)
Fix issue with FieldConvert when range flag used (!761)
Fix issue when using output-points combined with noequispaced (!775)
Fix equispacedoutput for 3DH1D with triangles (!787)

NekMesh:

Fix memory consumption issue with Gmsh output (!747, !762)
Rework meshing control so that if possible viewable meshes will be dumped
when some part of the system fails (!756)
Add manifold meshing option (!756)
Fix issue with older rea input files (!765)
Fix memory leak in variational optimiser, add small optimisations (!785)
Check the dimensionality of the CAD system before running the 2D generator (!780)
Fix uninitialised memory bug in Nek5000 input module (!801)

IncNavierStokesSolver

Fix an initialisation issue when using an additional advective field (!779)
Fix MovingBody boundary condition (!852)

Utilities

Fix vtkToFld missing dependency which prevented compiling with VTK 7.1 (!808)

Documentation

Added missing details on artificial viscosity and dealising to compressible
flow solver user guide (!846)

Packaging

Added missing package for FieldUtils library (!755)

ADRSolver:

Fix UnsteadyAdvectionDiffusion with DG (!855)


v4.4.0
Library:

Add support for variable polynomial order for 3D simulations with continuous
Galerkin discretisation (!604)
Bump version of gsmpi to suppress autotuning output unless --verbose is
specified (!652)
Add support for variable polynomial order with periodic boundary conditions
(!658)
Statistics are now printed for lowest level of multi-level static condensation
(!656)
Sped up interpolataion from pts files and fixed parallel pts import (!584)
Increased required boost version to 1.56.0 (!584)
New FieldUtils library allows support for most FieldConvert post-processing
operations during simulation using a new filter (!589)
Adjust CMake dependencies to reduce compile time (!671)
Homogeneous1D dealiasing improvements (!622)
Add support for HDF5 as an alternative output to XML-based output, including
refactoring of FieldIO, improvements to MPI interface and added communicators
to boundary conditions (!615)
Allow expansions to be loaded directly from field file (!617)
New options for load balancing (DOF or BOUNDARY) in mesh partitioner (!617)
Rework nodal utilities to support nodal prismatic elements (!660)
Update Body/Field forces at each timestep (!665)
Update nodalutil to include quad and hex elements and introduce SPI nodal
points (!696)
Add ability to restart time-averaging and Reynolds stresses from checkpoint
file (!678)
Extend ExtractDataToCoeffs to support interpolation between basis types for
quads and hexahedra (!682)
Enabled MUMPS support in PETSc if a Fortran compiler was found and added 3D
support to the Helmholtz smoother used e.g. in FieldConverts C0Projection
module (!714)
Fix bug in Vmath::FillWhiteNoise which caused ForcingNoise to have
a repeated pattern (!718)
Fix bug in the calculation of the RHS magnitude in CG solver (!721)
Fix bug in MPI detection for recent CMake on OS X (!725)
Fix bug in CMake Homebrew and MacPorts detection for OS X (!729)
Fix bug in FieldUtils when using half mode expansions (!734)
Do not read the same fld/pts files again for every variable (!670)
Fix bug in CMake PETSc detection for Ubuntu 16.04/Debian 9 (!735)
Fix warnings with Intel compiler (!742)

ADRSolver:

Add a projection equation system for C^0 projections (!675)

APESolver:

Use a continuous basefield projection and revert to constant c formulation (!664)
Added ability to compute CFL number (!664)
Output Sourceterm (!664)
Use the Forcing framework to define source terms (!665)

IncNavierStokesSolver:

Add ability to simulate additional scalar fields (!624)
Improve performance when using homogeneous dealiasing (!622)
Fix linearised advection for full 3D cases (!708)
Added a weak pressure formulation following Guermond & Shen (!713)
Added a convective like outflow boundary condition from Dong (!713)
Added the ability to specifiy Womersley boundary conditions for pulsatile flow (!472)

CardiacEPSolver:

Added a Python translator utility to generate cell models from CellML (!723)

FieldConvert:

Allow equi-spaced output for 1D and 2DH1D fields (!613)
Update quality metric to include scaled Jacobian output (!695)
Allow multiple XML files to be specified in InterpField module (!705)
Fix issues with isocontour module (!719)
Fix issue with interpolator routine (!746)

NekMesh:

Modify curve module to allow for spline input (!628)
Add STL surface writer module (!668)
New module for inserting an alternate high-order surface into the working
mesh (!669)
Add curve projection routines to CAD system (!697)
Extensive clean-up of NekMeshUtils/MeshElements and extension of makeorder to
consider CAD information (!698)
Improvements to mesh linearisation module (!659)
Add support for Gmsh high-order output (!679)
Move CAD classes to factory format (!676)
Add module to check topology of the mesh along with boundary connectivity
to detect problems such as hanging nodes (!691)
Add option to linearise module to linearise only prisms (!688)
Add reader for Nek5000 mesh files (!680)
Add option to linearise to use element quality (!690)
Add flag to insertsurface process for non-conforming geometries (!700)
Bug fix to get two meshgen regression tests working (!700)
Remove libANN in deference to boost::geometry (!703)
Refactor library to use NekMesh modules for CAD generation (!704)
Add varopti process module to optimise meshes (!711)
Add a mesh extract option to the linearise module to visualise the result
(!712)
2D to 3D mesh extrusion module (!715)
Add new two-dimensional mesher from NACA code or step file (!720)
Add basic gmsh cad (.geo) reader to the meshing system (!731)
Fix inverted boundary layer in 2D (!736)
More sensible element sizing with boundary layers in 2D (!736)
Change variable names in mcf file to make more sense (!736)
Fix issues in varopti module so that in can be compiled without meshgen on
(!736)
Replace LAPACK Eigenvalue calculation with handwritten function in
varopti (!738)
Improved node-colouring algorithm for better load-balancing
in varopti (!738)
Simplified calculation of the energy functional in varopti for improved
performance (!738)

FieldConvert:

Move all modules to a new library, FieldUtils, to support post-processing
during simulations (!589)
Add module to stretch homogeneous direction (!609)
Add module to add composite ID of elements as a field (!674)
Add reader for Nek5000 field files (!680)

Tester:

Fix output not displayed on segfault or system error (!745)


v4.3.5
Library:

Fix bug in DG with hybrid meshes (!694)
Fix issue with parallel output (!699)
Fix performance issue with iterative full solver (!693)
Enforced precision on history point output (!706)

Documentation

Update build instructions in user guide for Windows (!692)

Tester

Fix bug in tester when no parameters specified for test executable (!701)


v4.3.4
Library:

Fix performance issue with v_ExtractDataToCoeffs for post-processing of
large simulations (!672)
Added additional assertions to ensure homogeneous simulations have an even
number of planes per process (!666)
Fix compilation with NEKTAR_USE_MESHGEN option
Fix IterativeFull solver in parallel (!685)
Fix error message for missing fld file (!689)

IncNavierStokesSolver:

Fix 2nd order time-integration for VCSMapping (!687)


v4.3.4
Library:

Fix performance issue with v_ExtractDataToCoeffs for post-processing of large
simulations (!672)


v4.3.3
Library:

Auto-detect a shared filesystem and removed --shared-filesystem option (!654)
Fix filters when using adaptive driver to avoid output being overwritten after
each adaptive update (!588)
Minor fix to suppress Xxt output unless --verbose is specified (!642)
Fix of DirectFull solver in case where only Neumann boundary conditions
are imposed. (!655)

FieldConvert:

Fix to avoid repeated import of field file (!649)
Fix issue with C^0 projection (!644)
Fix verbose output when using --procid (!648)

NekMesh:

Fix namespace issue in Star-CCM+ input header in NekMesh (!661)

CompressibleFlowSolver:

Fix issue with residual output (!647)
Issues with 1D Euler solver fixed (!565)
Fix deadlocking issue with boundary conditions (!657)

Packaging:

Fix NekMesh dependencies for DEB package (!650)
Fix PETSc build on newer linux distributions (!646)


v4.3.2
Library:

Add small optimisation for DriverAdaptive (!618)
Updated FFTW build to use the compiler used for building Nektar++ (!629)
Fix numbering bug in periodic boundary conditions (!631)
Print error message for invalid equation also in release version (!634)
HistoryPoints filter now uses closest plane to requested z-coordinate and
output is produced in physical space (!621).
Fix minor performance issue with time integration schemes (!632)
Fix FilterCheckpoint filter to be consistent with IO_CheckSteps (!633)
Fix CMake configuration for building on Windows 10 with VS 2015 (!641)
Fix IO_CheckSteps to avoid missing first checkpoint (!639)
Fix bug in iterative solver where only root process would ASSERT when
exceeding the maximum number of iterations (!636)

FieldConvert:

Fix appearence of duplicate messages when running in parallel (!626)
Fix issue with efficiency when using large number of 3DH1D planes (!627)
Add module for combining average fields (!620)
Fix wall shear stress processing module for parallel execution (!635)

Packaging:

Fixes for DEB package dependencies (!630)


v4.3.1
Library:

Add THIRDPARTY_USE_SSL option to disable use of SSL on systems where CMake
is not compiled with SSL support. (!602)
Fixed a number of documentation issues (!586, !593, !596)
Fix Homogeneous transform when unshuffling is not used. (!599)
Fix namespace pollution in library header files. (!601)
Fix issue with METIS compilation on clang 7.3 (!603)
Fix issue with heterogeneous quadrilaterals (!607)
Fix bug in modified Arnoldi algorithm causing convergence to be reported when
number of vectors is less than nvec (!608)
Fix uninitialised array bug in AssemblyMap (!598)
Fix issue with LAPACK call in eigenvalue calculation (!610)
Fix FieldConvert processing of partitions in serial (!612)
Fix use of multi-level static condensation in parallel with periodic
boundary conditions (!614)
Fix NaN detection to work in parallel (!605)
Add additional constructor to ContField3DHomogeneous1D for FieldConvert
extract module. (!590)

NekMesh:

Fix incorrect link directory on CCMIO library.

FieldConvert:

Fix to FLD input to update the field definitions always, not just when a range
is specified. (!611)

Tester:

Remove requirement for executable to be specified in .tst file if it is
overridden on the command-line (!595)

Packaging:

Fix dependency resolution on generation of DEB packages. (!616)


v4.3.0
Library:

Changed default XML format to compress mesh data (!533, !547)
Various fixes for 3D homogeneous post-processing (!531, !529, !528, !526, !521)
Fix boundary condition imposition for 3D homogeneous 2D HelmSolve (!545)
Fix range with variable p option (!522)
Fix bug with hexahedra of heterogeneous order (!520) and reading files (!522)
Fix history point output formatting (!518)
Fix for OS X 10.11 (!512)
Fix HexGeom::v_GetDir to support heterogeneous basis functions (!520)
Added new NekMeshUtils library to support new NekMesh executable and
associated CAD routines. Old CAD wrappers in LibUtilities now moved to
NekMeshUtils (!527)
Fix initialisation bug in ExpList2DH1D and ExpListHomogeneous2D (!528, !529)
Fix bug in ExpList1D which may lead to invalid .vtu files (!531)
Make GetBoundaryToElmtMap consistent for 3DH1D (!526)
Add support for PETSc matrix shell to use Nektar++ operations/preconditioners
(!537)
Fix bug with initial conditions of CG simulations using variable P (!543)
Fix bug in 3DH2D with non-zero Dirichlet boundary conditions (!545)
Added in a method to convert equispaced interpolated points back to
coefficients which requires the introduction of a new StdRegions matrix.(!561)
Empty XML tags which would override non-empty XML tags are now ignored (!581)
Add contribution guide (!551)
Add a filter to calculate exponential moving averages (!566)

APESolver:

Fix restarting from checkpoint file (!517)

IncNavierStokesSolver

Fix floquet stability analysis for HalfMode case (!536)
Add a filter to calculate Reynolds stresses (!566)

FieldConvert:

Extended surface distance module to support hexahedra and quads (!524)
Small fixes in interpolation routine (!515)
Add support for surface extraction in 3DH1D case (!521)
Add support for isocontour extraction for 3DH1D (!525)
Add process module to calculate high-order mesh quality metric (!527).
Add module to extract one of the planes of 3DH1D (!542)
Add module to enable mean mode of 3DH1D to be extracted (!530)
Fix bug in C^0 projection (!541))
Add command line option to set number of homogeneous planes (!540)
Add module to project set of points to a fld file(!561)
Add support for interpolating to a box of points and fix ability to run
interppointstofld module in parallel when using a plane or box option (!561)
Add option to output equi-spaced points in VTU format (!550)
Add module innerproduct (!568)
Add command line option of --part-only and --part-only-overlapping (!569)

NekMesh:


MeshConvert is now renamed to NekMesh to reflect new mesh generation
functionality (!527).
Enable face curvature inside core MeshConvert objects (!511)
Add linearise processing module to remove all curvature from high order
elements (!509)

Documentation:

Added git submodule for including Nektar++ tutorials in the source tree (!507)


v4.2.0
Library:

Add Runge-Kutta SSP schemes for 2nd/3rd order using keys RungeKutta2_SSP and
RungeKutta3_SSP. ClassicalRungeKutta4 is now called RungeKutta4. (!481)
Add rudimentary support for 3D CAD models using OpenCascade - work in progress
(!486)
Allow filters to evaluate expressions in their parameter definitions (!489)
Fix block preconditioner to work with periodic boundary conditions (!420)
Dump a backtrace when crash occurs and Nektar++ is compiled in FullDebug mode
(!495)
Stop the execution of a time-dependent solver if NaN is detected in the
solution field (!496)
Fixes to improve robustness of interpolation routines (!499)
Allow solvers to use multi-level static condensation with Xxt, most useful
when running a 3DH1D simulation (!502)

IncNavierStokesSolver:

A range of fixes for the coupled stability solver, which now works in parallel
(!508)

MeshConvert:

Add module to extract prismatic boundary layer elements from mixed prism-tet
mesh (!493).

FieldConvert:

Add a processing module to calculate height of an element connected to a
surface, allowing for calculation of y plus values (!488)
Fixes for equispaced output (!510)


v4.1.0
Library:

Add support for interpolating point data from .pts files (!433)
Fixes for curvilinear element normals (!443)
Fix consistency issues between FFT and MVM approaches for homogeneous
expansions (!444)
Fix a bug in Tecplot output (!445)
Fix a bug with PETSc and MPI_Finalize (!456)
Fix bugs with mesh partitioning (!449, !480)
Fix a bug with non-symmetric SVV parameters for curvilinear elements (!451)
Fix detection of Intel MKL 2013/2015 (453)
Fix linearised stability solver in parallel (!454)
Add a filter for 1D energy spectra (!457)
Add an incomplete developer guide containing most information from the wiki
(!459)
Change user defined boundary conditions to remove dependency on enumerator
inside SpatialDomains (!460)
Add a new collections library for optimised evaluation of operators (!461)
Change minimum version of boost to 1.52.
Add initial multithreading support (!463)
Fix third-party boost compilation on OS X (!467)
Disable some regression tests on 32-bit systems (!468)
Fix memory issues inside collections (!473)
Fix collections autotuning (!476)
Fix VtkToPng utility (!477)
Add PulseWaveSolver to packaging (!478)
Fix bug in iterative static condensation solver (!483)
Fix zlib install path on OS X (!484)
Fix documentation HTML styling for user and developer guide (!485)
Add fixes to support native Nektar++ extension in VisIt visulisation software
(!490)
Fix warnings on OS X (!491)

CardiacEPSolver:

Fixes for stimuli (!442, !446), conductivity (!441), cell restarts (!458)
Add a new filter for outputting cell states at specific points over time (!465)

Linear elastic solver (new):

Add solver for linear elasticity equations (!400)

IncNavierStokesSolver:

Add support for moving bodies (!344, !448)
Fixes for modal energy filter (!427)
Fix import of mesh file in the Adaptive SFD driver (!440) and other general
fixes (!452)
Documentation for high order pressure and outflow boundary conditions (!447)
Update examples to use correct forcing terms (!470)
Fixes for half-mode stability (!471)
Fix static initialisation problem in extrapolation classes (!492)

CompressibleFlowSolver:

Add support for sponge region (!396)
Add support for adiabiatic walls (!430)
Add utility to generate boundary layer from similarity solution (!438)

ShallowWaterSolver:

Added a DG solver for the Boussinesq equations of Peregrine (!431)

APESolver:

Add support for variable speed of sound (!438)

MeshConvert:

Fix Star file input for highly stretched elements (!455)
Add Star input from binary format (!474)
Tidy up files to align with FieldConvert (!479)

FieldConvert:

Major re-organisation of modules, most post-processing utilities now available
within FieldConvert (!475)


v4.0.1
Library:

Change hybrid parallelisation to use command line options (!368)
Add support for multi-variable functions in expression evaluator: new
functions include rad and ang for polar coordinates (!375)
Add more documentation (!376, !383)
Various OS X (!377, !378, !382, !425), compiler warning (!432), documentation
(!434) Windows 7 (!391, !407), CMake (!392, !415), packaging (!435, !436) and
Intel compiler (!414, !416) fixes
Refactor of CG and DG assembly maps (!380)
Fixes for PETSc running in serial (!381, !420)
Fixes for running Arnoldi solver in parallel (!384)
Enable MPI tests on Cray machines such as ARCHER (!386)
Fix issues with extracting face physical values (!393)
Fix threshold filter (!395)
HDG can now use block preconditioner (!397)
Fix issue with singular vertices in parallel (!398)
Timing executables now use Timer class from LibUtilities (!402)
Fix manifold history points again (!410)
Fix time output inside energy filter (!412)
Fix GetExpIndex function (!417)
Fixes to external project compilation (!419)
Fixes from CPC paper review (!422)
Fixes for scotch partitioner tests (!423)
Fixes for ACML BLAS libraries (!424)
Allow prepartitioned meshes to be used (!426)
Enable variable names to be remapped inside files to different names in XML
functions (!428)

APESolver:

Fixes for tests (!404)
Add support for advection classes (!408)

CardiacEPSolver:

Add benchmark (!411)
Fix cardiac exmplaes (!418)

CompressibleFlowSolver:

Add filter for kinetic energy/enstrophy calculation (!388)

FieldConvert:

Support equi-spaced output for simplex elements to reduce storage (!421)

IncNavierStokesSolver:

Unify advection classes with those in SolverUtils (!403, !408)

MeshConvert:

Boundary layer refinement now supports hexahedra (!390)
Improve support for Gmsh high order elements (!401)
Many fixes for face-interior curvature (!401)
Add rudimentary test suite (!401)
New module for imposing curvature based on a scalar function (!401)


v4.0.0
Library:

Update boost to 1.55 (!289)
Fix parallel history points on manifold (!298)
Add support for scotch partitioner (!311)
Fixes for thirdparty builds (!319, !330, !353)
Fix CMake >= 3.0.0 warnings (!320)
Add support for PETSc library and tidy up global system classes (!322)
Fixes for 1D Helmholtz solver (!326)
Fixes for history points (!327) and solver output (!331)
Fix issue with mesh IDs that do not start from zero (!354)

CardiacEPSolver:

Simplify support for global conductiity (!295)

FieldConvert:

Fixes for parallel operation and interpolation of points (!351)

IncNavierStokesSolver:

Fixes for sponge layer (!272)
Fix setting of initial conditions (!298)


v3.4.0
Library:

New parallel output format. Parallel files are now stored in directories which
contain partition information. (!100, !102, !236, !242, !249, !256).
gzip-compressed XML mesh files are now supported with extension .xml.gz (!116,
!140, !186).
HDG solvers now run in parallel and have post-processing utilities (!188,
!230).
Partitioning can be done only on root process if shared filesystem is
present with use of --shared-filesystem command line option (!220, !250).
A variety of preconditioners are now supported, including linear space and
low-energy preconditioning (!148).
Many changes to geometric factors storage and interpolation (!99, !197).
Improvements to identification of invalid elements (!208, !227).
Removed elemental storage to reduce memory consumption by 30-50% for large
problems (!240).
Various performance and design improvements for discontinuous formulation (!134).
Periodic boundary conditions are supported in 3D for both continuous and
discontinuous formulations (!139, !150, !152, !155, !196).
Utilities added to mesh converter to help identify pairs of periodic faces
(!214).
Preconditioner support for periodic boundary conditions (!231, !239).
New radiation boundary condition type (!74).
Some solvers (compressible flow solver, advection-diffusion-reaction solver)
now support dealiasing options (!78, !146, !167).
BLAS and vectorisation performance improvements for static-condensed iterative
solver (!86, !109).
New driver to improve steady state convergence and add parallel support (!91,
!235).
Updated to METIS v5.1.0 (!97, !142, !189).
Iterative solvers now use previous timestep (when available) to improve
convergence speed (!106).
Added CPU timing for timestep loop (!156).
Added provenance information (date, time, code version, git revision, etc) to
field file output (!179).
Disabled long-running regression tests by default (!183).
Support for command line arguments without parameters (!187).
Added support for reading boundary conditions from files, and appropriate
utilities in MeshConvert to extract surfaces (!226).
Updated XXt and Gs libraries to latest version (!232).
Fix singularity check for Poisson equations (!74, !154).
Fixes for 2D Gauss points (!73, !149, !157).
Fixes to parallel I/O (!77, !218, !264).
Fixes for parallel implementation (!93, !107, !121, !169, !217, !245, !246).
Fixes for normal calculation (!94, !135).
Improved compilation techniques, particularly when compiler includes MPI
automatically (!80, !82, !84, !85, !113, !114, !131, !141, !166, !210, !241).
Updated zlib to v1.2.7 (!115).
Fix for boost 1.5.3 compilation (!120).
Most compiler warnings silenced with clang/gcc (!81, !92, !103, !123, !201,
!243).
Attempts to improve mesh partitioning/load balancing (!160, !170, !175).
Fixes for Newton iteration to interpolate inside deformed elements (!216,
!251).
Fixed curved tetrahedron and hexahedron issue (!219, !248).
Fixed reading of field files for tetrahedron (!228).
Fixed uninitialised variable inside SessionrReader (!233).
Various improvements to support use of Nektar++ externally (!111, !260, !261).
Fixed base flow reading (!112).

CardiacEPSolver:

Cardiac electrophysiology solver improvements (!87, !95, !96, !108, !119,
!165, !173, !174, !199, !222).

CompressibleFlowSolver:

Compressible Navier-Stokes equations are now available for both DG and FR
discretisations (!110, !125, !128).
Meshes with spatially varying p in both 2D and 3D are now supported (!158).
Homogeneous Fourier extension is now supported (!180).
Various fixes (!90, !98, !147, !172).

DiffusionSolver (new):

Added small solver to demonstrate usage of higher library levels outside of
EquationSystem (!225).

IncNavierStokesSolver:

Major refactoring of time-integration classes (!181, !184).
Summary information now generated via callbacks (!182).
Implemented new generic forcing function classes (!194).
Current time now written out in field files (!198).
Major refactoring of incompressible Navier-Stokes solver to improve
readability and performance (212, !213).
Spectral vanishing viscosity for stabilisation (!101, !104, !211, !263).
Added filter to compute aerodynamic forces on surfaces (!168, !203, !204).
Added filter to compute kinetic energy and enstrophy (!207, !257).

ShallowWaterSolver:

Various improvements/modernisations to shallow water solver (!190).

Utilities:

VTK to PNG converter (!122)
Added scalar gradient utility (!129, !252).
Added utility to calculate Q-criterion field (!153).
Added support to XmlToVtk to write Jacobian field (!223).
Added utility to calculate wall shear stress (!224).
Fixed vorticity calculator (!138).

MeshConvert:

Added face-interior quadrature and 2D/3D manifold support to spherigon code
(!130).
Fixes for boundary layer refinement and prism-to-tetrahedron splitting (!137,
!202, !206, !244).

FieldConvert (new):

Added new FieldConvert utility which will eventually encompass most existing
utilities (!255).