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    • Henry Weller's avatar
      rhoSimpleFoam: added support for compressible liquid flows · a1c8cde3
      Henry Weller authored
      rhoSimpleFoam now instantiates the lower-level fluidThermo which instantiates
      either a psiThermo or rhoThermo according to the 'type' specification in
      thermophysicalProperties, e.g.
      
      thermoType
      {
          type            hePsiThermo;
          mixture         pureMixture;
          transport       sutherland;
          thermo          janaf;
          equationOfState perfectGas;
          specie          specie;
          energy          sensibleInternalEnergy;
      }
      
      instantiates a psiThermo for a perfect gas with JANAF thermodynamics, whereas
      
      thermoType
      {
          type            heRhoThermo;
          mixture         pureMixture;
          properties      liquid;
          energy          sensibleInternalEnergy;
      }
      
      mixture
      {
          H2O;
      }
      
      instantiates a rhoThermo for water, see new tutorial
      compressible/rhoSimpleFoam/squareBendLiq.
      
      In order to support complex equations of state the pressure can no longer be
      unlimited and rhoSimpleFoam now limits the pressure rather than the density to
      handle start-up more robustly.
      
      For backward compatibility 'rhoMin' and 'rhoMax' can still be used in the SIMPLE
      sub-dictionary of fvSolution which are converted into 'pMax' and 'pMin' but it
      is better to set either 'pMax' and 'pMin' directly or use the more convenient
      'pMinFactor' and 'pMinFactor' from which 'pMax' and 'pMin' are calculated using
      the fixed boundary pressure or reference pressure e.g.
      
      SIMPLE
      {
          nNonOrthogonalCorrectors 0;
      
          pMinFactor      0.1;
          pMaxFactor      1.5;
      
          transonic       yes;
          consistent      yes;
      
          residualControl
          {
              p               1e-3;
              U               1e-4;
              e               1e-3;
              "(k|epsilon|omega)" 1e-3;
          }
      }
      a1c8cde3
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