Post-processing
Nektar++ based post-processing
The current distribution of the code has a specific Nektar++ output format. The solvers write the solution to .fld files in the Nektar++ output format.
External packages
To convert this output to other formats we have provided a number of utilities in the Nektar++/utilities/PostProcessing directory.
- FldToVtk - VTK format
VTK is an open format which is readable by almost any visualisation software. It is available in two formats: legacy and XML. The Nektar++ library supports the newer XML ASCII format.
- FldToGmsh - Gmsh format
Gmsh is an automatic three-dimensional finite element mesh generator with built-in pre- and post-processing facilities. Its design goal is to provide a simple meshing tool for academic problems with parametric input and advanced visualization capabilities.
As it has the capability of visualising high-order data, it is particularly useful in combination with the spectral/hp element method and Nektar++.
Gmsh is distributed freely under the terms of the GNU General Public License and pre-compiled binaries for Windows, Linux and Mac OS X are available from its website.
- FldToTecplot - Tecplot format
Tecplot is a Computational Fluid Dynamics (CFD) and numerical simulation software package frequently used in post-processing simulation results. However as opposed to Gmsh, it is not distributed freely.