applications/solvers/compressible/rhoCentralFoam/rhoCentralFoam.C

   1 /*---------------------------------------------------------------------------*\
   2   =========                 |
   3   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   4    \\    /   O peration     |
   5     \\  /    A nd           | Copyright (C) 1991-2008 OpenCFD Ltd.
   6      \\/     M anipulation  |
   7 -------------------------------------------------------------------------------
   8 License
   9     This file is part of OpenFOAM.
  10
  11     OpenFOAM is free software; you can redistribute it and/or modify it
  12     under the terms of the GNU General Public License as published by the
  13     Free Software Foundation; either version 2 of the License, or (at your
  14     option) any later version.
  15
  16     OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
  17     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  18     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  19     for more details.
  20
  21     You should have received a copy of the GNU General Public License
  22     along with OpenFOAM; if not, write to the Free Software Foundation,
  23     Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  24
  25 Application
  26     rhoCentralFoam
  27
  28 Description
  29     Density-based compressible flow solver based on central-upwind schemes of
  30     Kurganov and Tadmor
  31
  32 \*---------------------------------------------------------------------------*/
  33
  34 #include "fvCFD.H"
  35 #include "basicThermo.H"
  36 #include "zeroGradientFvPatchFields.H"
  37 #include "fixedRhoFvPatchScalarField.H"
  38
  39 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
  40
  41 int main(int argc, char *argv[])
  42 {
  43
  44 #   include "setRootCase.H"
  45
  46 #   include "createTime.H"
  47 #   include "createMesh.H"
  48 #   include "createFields.H"
  49 #   include "readThermophysicalProperties.H"
  50 #   include "readTimeControls.H"
  51
  52 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
  53
  54 #   include "readFluxScheme.H"
  55
  56     dimensionedScalar v_zero("v_zero",dimVolume/dimTime, 0.0);
  57
  58     Info<< "\nStarting time loop\n" << endl;
  59
  60     while (runTime.run())
  61     {
  62         // --- upwind interpolation of primitive fields on faces
  63
  64         surfaceScalarField rho_pos =
  65             fvc::interpolate(rho, pos, "reconstruct(rho)");
  66         surfaceScalarField rho_neg =
  67             fvc::interpolate(rho, neg, "reconstruct(rho)");
  68
  69         surfaceVectorField rhoU_pos =
  70             fvc::interpolate(rhoU, pos, "reconstruct(U)");
  71         surfaceVectorField rhoU_neg =
  72             fvc::interpolate(rhoU, neg, "reconstruct(U)");
  73
  74         volScalarField rPsi = 1.0/psi;
  75         surfaceScalarField rPsi_pos =
  76             fvc::interpolate(rPsi, pos, "reconstruct(T)");
  77         surfaceScalarField rPsi_neg =
  78             fvc::interpolate(rPsi, neg, "reconstruct(T)");
  79
  80         surfaceScalarField h_pos =
  81             fvc::interpolate(h, pos, "reconstruct(T)");
  82         surfaceScalarField h_neg =
  83             fvc::interpolate(h, neg, "reconstruct(T)");
  84
  85         surfaceVectorField U_pos = rhoU_pos/rho_pos;
  86         surfaceVectorField U_neg = rhoU_neg/rho_neg;
  87
  88         surfaceScalarField p_pos = rho_pos*rPsi_pos;
  89         surfaceScalarField p_neg = rho_neg*rPsi_neg;
  90
  91         surfaceScalarField phiv_pos = U_pos & mesh.Sf();
  92         surfaceScalarField phiv_neg = U_neg & mesh.Sf();
  93
  94         volScalarField c = sqrt(thermo->Cp()/thermo->Cv()*rPsi);
  95         surfaceScalarField cSf_pos = fvc::interpolate(c, pos, "reconstruct(T)")*mesh.magSf();
  96         surfaceScalarField cSf_neg = fvc::interpolate(c, neg, "reconstruct(T)")*mesh.magSf();
  97
  98         surfaceScalarField ap = max(max(phiv_pos + cSf_pos, phiv_neg + cSf_neg), v_zero);
  99         surfaceScalarField am = min(min(phiv_pos - cSf_pos, phiv_neg - cSf_neg), v_zero);
 100
 101         surfaceScalarField a_pos = ap/(ap - am);
 102
 103         surfaceScalarField amaxSf("amaxSf", max(mag(am), mag(ap)));
 104
 105 #       include "compressibleCourantNo.H"
 106 #       include "readTimeControls.H"
 107 #       include "setDeltaT.H"
 108
 109         runTime++;
 110
 111         Info<< "Time = " << runTime.timeName() << nl << endl;
 112
 113         surfaceScalarField aSf = am*a_pos;
 114
 115         if (fluxScheme == "Tadmor")
 116         {
 117             aSf = -0.5*amaxSf;
 118             a_pos = 0.5;
 119         }
 120
 121         surfaceScalarField a_neg = (1.0 - a_pos);
 122
 123         phiv_pos *= a_pos;
 124         phiv_neg *= a_neg;
 125
 126         surfaceScalarField aphiv_pos = phiv_pos - aSf;
 127         surfaceScalarField aphiv_neg = phiv_neg + aSf;
 128
 129         surfaceScalarField phi("phi", aphiv_pos*rho_pos + aphiv_neg*rho_neg);
 130
 131         surfaceVectorField phiUp =
 132             (aphiv_pos*rhoU_pos + aphiv_neg*rhoU_neg)
 133           + (a_pos*p_pos + a_neg*p_neg)*mesh.Sf();
 134
 135         surfaceScalarField phiEp =
 136             aphiv_pos*rho_pos*(h_pos + 0.5*magSqr(U_pos))
 137           + aphiv_neg*rho_neg*(h_neg + 0.5*magSqr(U_neg))
 138           + aSf*p_pos - aSf*p_neg;
 139
 140         volTensorField tauMC("tauMC", mu*dev2(fvc::grad(U)().T()));
 141
 142         // --- Solve density
 143         solve(fvm::ddt(rho) + fvc::div(phi));
 144
 145         // --- Solve momentum
 146         solve(fvm::ddt(rhoU) + fvc::div(phiUp));
 147
 148         U.dimensionedInternalField() =
 149             rhoU.dimensionedInternalField()
 150            /rho.dimensionedInternalField();
 151         U.correctBoundaryConditions();
 152         rhoU.boundaryField() = rho.boundaryField()*U.boundaryField();
 153
 154         volScalarField rhoBydt(rho/runTime.deltaT());
 155
 156         if (!inviscid)
 157         {
 158             solve
 159             (
 160                 fvm::ddt(rho, U) - fvc::ddt(rho,U)
 161               - fvm::laplacian(mu, U)
 162               - fvc::div(tauMC)
 163             );
 164             rhoU = rho*U;
 165         }
 166
 167         // --- Solve energy
 168         surfaceScalarField sigmaDotU =
 169         (
 170             (
 171                 fvc::interpolate(mu)*mesh.magSf()*fvc::snGrad(U)
 172               + (mesh.Sf() & fvc::interpolate(tauMC))
 173             )
 174             & (a_pos*U_pos + a_neg*U_neg)
 175         );
 176
 177         solve
 178         (
 179             fvm::ddt(rhoE)
 180           + fvc::div(phiEp)
 181           - fvc::div(sigmaDotU)
 182         );
 183
 184         h = (rhoE + p)/rho - 0.5*magSqr(U);
 185         h.correctBoundaryConditions();
 186         thermo->correct();
 187         rhoE.boundaryField() =
 188             rho.boundaryField()*
 189             (
 190                 h.boundaryField() + 0.5*magSqr(U.boundaryField())
 191             )
 192           - p.boundaryField();
 193
 194         if (!inviscid)
 195         {
 196             volScalarField k("k", thermo->Cp()*mu/Pr);
 197             solve
 198             (
 199                 fvm::ddt(rho, h) - fvc::ddt(rho, h)
 200               - fvm::laplacian(thermo->alpha(), h)
 201               + fvc::laplacian(thermo->alpha(), h)
 202               - fvc::laplacian(k, T)
 203             );
 204             thermo->correct();
 205             rhoE = rho*(h + 0.5*magSqr(U)) - p;
 206         }
 207
 208         p.dimensionedInternalField() =
 209             rho.dimensionedInternalField()
 210            /psi.dimensionedInternalField();
 211         p.correctBoundaryConditions();
 212         rho.boundaryField() = psi.boundaryField()*p.boundaryField();
 213
 214         runTime.write();
 215
 216         Info<< "ExecutionTime = " << runTime.elapsedCpuTime() << " s"
 217             << "  ClockTime = " << runTime.elapsedClockTime() << " s"
 218             << nl << endl;
 219     }
 220
 221     Info<< "End\n" << endl;
 222
 223     return(0);
 224 }
 225
 226 // ************************************************************************* //