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  9. 09 Dec, 2017 1 commit
    • Henry Weller's avatar
      BUG: compressibleInterFoam family: Corrected transonic option · 293c0c30
      Henry Weller authored
      Resolves bug-report https://bugs.openfoam.org/view.php?id=2785
      
      ENH: compressibleInterFoam family: merged two-phase momentum stress modelling from compressibleInterPhaseTransportFoam
      
      The new momentum stress model selector class
      compressibleInterPhaseTransportModel is now used to select between the options:
      
      Description
          Transport model selection class for the compressibleInterFoam family of
          solvers.
      
          By default the standard mixture transport modelling approach is used in
          which a single momentum stress model (laminar, non-Newtonian, LES or RAS) is
          constructed for the mixture.  However if the \c simulationType in
          constant/turbulenceProperties is set to \c twoPhaseTransport the alternative
          Euler-Euler two-phase transport modelling approach is used in which separate
          stress models (laminar, non-Newtonian, LES or RAS) are instantiated for each
          of the two phases allowing for different modeling for the phases.
      
      Mixtu...
      293c0c30
  10. 30 Oct, 2017 1 commit
    • Henry Weller's avatar
      ENH: compressibleInterPhaseTransportFoam: New variant of compressibleInterFoam... · dbc111e6
      Henry Weller authored
      ENH: compressibleInterPhaseTransportFoam: New variant of compressibleInterFoam supporting separate phase stress models
      
      In this version of compressibleInterFoam separate stress models (laminar,
      non-Newtonian, LES or RAS) are instantiated for each of the two phases allowing
      for completely different modeling for the phases.
      
      e.g. in the climbingRod tutorial case provided a Newtonian laminar model is
      instantiated for the air and a Maxwell non-Newtonian model is instantiated for
      the viscoelastic liquid.  To stabilize the Maxwell model in regions where the
      liquid phase-fraction is 0 the new symmTensorPhaseLimitStabilization fvOption is
      applied.
      
      Other phase stress modeling combinations are also possible, e.g. the air may be
      turbulent but the liquid laminar and an RAS or LES model applied to the air
      only.  However, to stabilize this combination a suitable fvOption would need to
      be applied to the turbulence properties where the air phase-fraction is 0.
      
      Henry G. Weller, Chris Greenshields
      CFD Direct Ltd.
      dbc111e6
  11. 22 Dec, 2015 1 commit
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  14. 21 Jan, 2015 1 commit
    • Henry's avatar
      Updated the whole of OpenFOAM to use the new templated TurbulenceModels library · 2aec2496
      Henry authored
      The old separate incompressible and compressible libraries have been removed.
      
      Most of the commonly used RANS and LES models have been upgraded to the
      new framework but there are a few missing which will be added over the
      next few days, in particular the realizable k-epsilon model.  Some of
      the less common incompressible RANS models have been introduced into the
      new library instantiated for incompressible flow only.  If they prove to
      be generally useful they can be templated for compressible and
      multiphase application.
      
      The Spalart-Allmaras DDES and IDDES models have been thoroughly
      debugged, removing serious errors concerning the use of S rather than
      Omega.
      
      The compressible instances of the models have been augmented by a simple
      backward-compatible eddyDiffusivity model for thermal transport based on
      alphat and alphaEff.  This will be replaced with a separate run-time
      selectable thermal transport model framework in a few weeks.
      
      For simplicity and ease of maintenance and further development the
      turbulent transport and wall modeling is based on nut/nuEff rather than
      mut/muEff for compressible models so that all forms of turbulence models
      can use the same wall-functions and other BCs.
      
      All turbulence model selection made in the constant/turbulenceProperties
      dictionary with RAS and LES as sub-dictionaries rather than in separate
      files which added huge complexity for multiphase.
      
      All tutorials have been updated so study the changes and update your own
      cases by comparison with similar cases provided.
      
      Sorry for the inconvenience in the break in backward-compatibility but
      this update to the turbulence modeling is an essential step in the
      future of OpenFOAM to allow more models to be added and maintained for a
      wider range of cases and physics.  Over the next weeks and months more
      turbulence models will be added of single and multiphase flow, more
      additional sub-models and further development and testing of existing
      models.  I hope this brings benefits to all OpenFOAM users.
      
      Henry G. Weller
      2aec2496
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