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Fixed Taylor-Hood expansions for Velocity-Correction Scheme with weak pressure forcing

Issue/feature addressed

The Velocity Correction scheme with weak pressure forcing (VCSWeakPressure) did previously call the inner product operator IProductWRTDerivBase via m_fields[0] which would use the velocity expansion. However, the taylor-hood expansion uses different polynomial orders for velocity and pressure expansion leading to a wrong forcing term.

Proposed solution

Call IProductWRTDerivBase via the pressure ExpList (m_pressure)

Implementation

Simply changed "m_fields[0]->" to "m_pressure->"

Tests

Added regression tests based on Kovasznay flow that runs IncNavierStokesSolver with VSCWeakPressure and a Taylor-Hood expansion.

Notes

None

Checklist

  • Functions and classes, or changes to them, are documented.
  • User guide/documentation is updated.
  • Changelog is updated.
  • Suitable tests added for new functionality.
  • Contributed code is correctly formatted. (See the contributing guidelines).
  • License added to any new files.
  • No extraneous files have been added (e.g. compiler output or test data files).

Warning

On the 19.07 the code formatting (code style) was standardised using clang-format, over the whole Nektar++ code. This means changes in your branch will conflict with formatting changes on the master branch. To resolve these conflicts , see #295 (closed)

Edited by Henrik Wustenberg

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