applications/solvers/multiphase/twoLiquidMixingFoam/UEqn.H

   1     surfaceScalarField muEff
   2     (
   3         "muEff",
   4         twoPhaseProperties.muf()
   5       + fvc::interpolate(rho*turbulence->nut())
   6     );
   7
   8     fvVectorMatrix UEqn
   9     (
  10         fvm::ddt(rho, U)
  11       + fvm::div(rhoPhi, U)
  12       - fvm::laplacian(muEff, U)
  13       - (fvc::grad(U) & fvc::grad(muEff))
  14     //- fvc::div(muEff*(fvc::interpolate(dev(fvc::grad(U))) & mesh.Sf()))
  15     );
  16
  17     if (oCorr == nOuterCorr-1)
  18     {
  19         UEqn.relax(1);
  20     }
  21     else
  22     {
  23         UEqn.relax();
  24     }
  25
  26     if (momentumPredictor)
  27     {
  28         solve
  29         (
  30             UEqn
  31          ==
  32             fvc::reconstruct
  33             (
  34                 fvc::interpolate(rho)*(g & mesh.Sf())
  35               - mesh.magSf()*fvc::snGrad(p)
  36             ),
  37             mesh.solver(oCorr == nOuterCorr-1 ? "UFinal" : "U")
  38         );
  39     }