applications/solvers/basic/potentialDyMFoam/potentialDyMFoam.C

   1 /*---------------------------------------------------------------------------*\
   2   =========                 |
   3   \\      /  F ield         | foam-extend: Open Source CFD
   4    \\    /   O peration     | Version:     3.2
   5     \\  /    A nd           | Web:         http://www.foam-extend.org
   6      \\/     M anipulation  | For copyright notice see file Copyright
   7 -------------------------------------------------------------------------------
   8 License
   9     This file is part of foam-extend.
  10
  11     foam-extend 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 3 of the License, or (at your
  14     option) any later version.
  15
  16     foam-extend is distributed in the hope that it will be useful, but
  17     WITHOUT ANY WARRANTY; without even the implied warranty of
  18     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19     General Public License for more details.
  20
  21     You should have received a copy of the GNU General Public License
  22     along with foam-extend.  If not, see <http://www.gnu.org/licenses/>.
  23
  24 Application
  25     potentialDyMFoam
  26
  27 Description
  28     Transient solver for potential flow with dynamic mesh.
  29
  30 Author
  31     Hrvoje Jasak, Wikki Ltd.  All rights reserved.
  32
  33 \*---------------------------------------------------------------------------*/
  34
  35 #include "fvCFD.H"
  36 #include "dynamicFvMesh.H"
  37 #include "pisoControl.H"
  38
  39 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
  40
  41 int main(int argc, char *argv[])
  42 {
  43     argList::validOptions.insert("resetU", "");
  44     argList::validOptions.insert("writep", "");
  45
  46 #   include "setRootCase.H"
  47 #   include "createTime.H"
  48 #   include "createDynamicFvMesh.H"
  49
  50     pisoControl piso(mesh);
  51
  52 #   include "createFields.H"
  53 #   include "initTotalVolume.H"
  54
  55 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
  56
  57     Info<< "\nStarting time loop\n" << endl;
  58
  59     while (runTime.loop())
  60     {
  61 #       include "checkTotalVolume.H"
  62
  63         Info<< "Time = " << runTime.timeName() << nl << endl;
  64
  65         bool meshChanged = mesh.update();
  66         reduce(meshChanged, orOp<bool>());
  67
  68         p.internalField() = 0;
  69
  70         if (args.optionFound("resetU"))
  71         {
  72             U.internalField() = vector::zero;
  73         }
  74
  75 #       include "volContinuity.H"
  76 #       include "meshCourantNo.H"
  77
  78         // Solve potential flow equations
  79         adjustPhi(phi, U, p);
  80
  81         while (piso.correctNonOrthogonal())
  82         {
  83             p.storePrevIter();
  84
  85             fvScalarMatrix pEqn
  86             (
  87                 fvm::laplacian
  88                 (
  89                     dimensionedScalar
  90                     (
  91                         "1",
  92                         dimTime/p.dimensions()*dimensionSet(0, 2, -2, 0, 0),
  93                         1
  94                     ),
  95                     p
  96                 )
  97              ==
  98                 fvc::div(phi)
  99             );
 100
 101             pEqn.setReference(pRefCell, pRefValue);
 102             pEqn.solve();
 103
 104             if (piso.finalNonOrthogonalIter())
 105             {
 106                 phi -= pEqn.flux();
 107             }
 108             else
 109             {
 110                 p.relax();
 111             }
 112         }
 113
 114         Info<< "continuity error = "
 115             << mag(fvc::div(phi))().weightedAverage(mesh.V()).value()
 116             << endl;
 117
 118         U = fvc::reconstruct(phi);
 119         U.correctBoundaryConditions();
 120
 121         Info<< "Interpolated U error = "
 122             << (sqrt(sum(sqr((fvc::interpolate(U) & mesh.Sf()) - phi)))
 123             /sum(mesh.magSf())).value()
 124             << endl;
 125
 126         // Calculate velocity magnitude
 127         {
 128             volScalarField magU = mag(U);
 129
 130             Info<< "mag(U): max: " << gMax(magU.internalField())
 131                 << " min: " << gMin(magU.internalField()) << endl;
 132         }
 133
 134         if (args.optionFound("writep"))
 135         {
 136             // Find reference patch
 137             label refPatch = -1;
 138             scalar maxMagU = 0;
 139
 140             // Go through all velocity patches and find the one that fixes
 141             // velocity to the largest value
 142
 143             forAll (U.boundaryField(), patchI)
 144             {
 145                 const fvPatchVectorField& Upatch = U.boundaryField()[patchI];
 146
 147                 if (Upatch.fixesValue())
 148                 {
 149                     // Calculate mean velocity
 150                     scalar u = sum(mag(Upatch));
 151                     label patchSize = Upatch.size();
 152
 153                     reduce(u, sumOp<scalar>());
 154                     reduce(patchSize, sumOp<label>());
 155
 156                     if (patchSize > 0)
 157                     {
 158                         scalar curMag = u/patchSize;
 159
 160                         if (curMag > maxMagU)
 161                         {
 162                             refPatch = patchI;
 163
 164                             maxMagU = curMag;
 165                         }
 166                     }
 167                 }
 168             }
 169
 170             if (refPatch > -1)
 171             {
 172                 // Calculate reference pressure
 173                 const fvPatchVectorField& Upatch = U.boundaryField()[refPatch];
 174                 const fvPatchScalarField& pPatch = p.boundaryField()[refPatch];
 175
 176                 scalar patchE = sum(mag(pPatch + 0.5*magSqr(Upatch)));
 177                 label patchSize = Upatch.size();
 178
 179                 reduce(patchE, sumOp<scalar>());
 180                 reduce(patchSize, sumOp<label>());
 181
 182                 scalar e = patchE/patchSize;
 183
 184                 Info<< "Using reference patch " << refPatch
 185                     << " with mag(U) = " << maxMagU
 186                     << " p + 0.5*U^2 = " << e << endl;
 187
 188                 p.internalField() = e - 0.5*magSqr(U.internalField());
 189                 p.correctBoundaryConditions();
 190             }
 191         }
 192
 193         runTime.write();
 194
 195         Info<< "ExecutionTime = " << runTime.elapsedCpuTime() << " s"
 196             << "  ClockTime = " << runTime.elapsedClockTime() << " s"
 197             << nl << endl;
 198     }
 199
 200     Info<< "End\n" << endl;
 201
 202     return(0);
 203 }
 204
 205
 206 // ************************************************************************* //