wallShearStressWriter.C

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/*---------------------------------------------------------------------------*\
    Copyright            : (C) 2011 Symscape
    Website              : www.symscape.com
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.
 
    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
 
\*---------------------------------------------------------------------------*/
 
#include "wallShearStressWriter.H"
#include "fvCFD.H"
#include "dictionary.H"
#include "Time.H"
#include "wallFvPatch.H"
#include "incompressibleTurbulenceModel.H"
#include "compressibleTurbulenceModel.H"
 
 
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
namespace Foam
{
  defineTypeNameAndDebug(wallShearStressWriter, 0);
  const word wallShearStressWriter::FIELD_NAME("wallShearStress");
}
 
 
// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
 
Foam::tmp<Foam::volScalarField> 
Foam::wallShearStressWriter::rho(const objectRegistry& obr) const
{
    if (rhoName_ == "rhoInf")
    {
        const fvMesh& mesh = refCast<const fvMesh>(obr);
 
        return tmp<volScalarField>
        (
            new volScalarField
            (
                IOobject
                (
                    "rho",
                    mesh.time().timeName(),
                    mesh
                ),
                mesh,
                dimensionedScalar("rho", dimDensity, rhoRef_)
            )
        );
    }
    else
    {
        return (obr.lookupObject<volScalarField>(rhoName_));
    }
}
 
 
Foam::tmp<Foam::volSymmTensorField> 
Foam::wallShearStressWriter::devRhoReff(const objectRegistry& obr, 
                                        bool & foundField) const
{
  typedef incompressibleTurbulenceModel iTModel;
  typedef compressibleTurbulenceModel cTModel;
 
  if (obr.foundObject<iTModel>(turbulenceModel::propertiesName))
    {
      const iTModel& tModel
        = obr.lookupObject<iTModel>(turbulenceModel::propertiesName);
 
      return rho(obr)*tModel.devReff();
    }
  else if (obr.foundObject<cTModel>(turbulenceModel::propertiesName))
    {
      const cTModel& tModel
        = obr.lookupObject<cTModel>(turbulenceModel::propertiesName);
 
      return tModel.devRhoReff();
    }
 
  foundField = false;
  return volSymmTensorField::null();
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::wallShearStressWriter::wallShearStressWriter(const dictionary & dict)
  : derivedFieldWriter(dict),
    rhoName_("rho"),
    rhoRef_(1.)
{
  // Optional entry rhoName
  dict.readIfPresent("rhoName", rhoName_);
 
  // Reference density needed for incompressible calculations
  dict.readIfPresent("rhoInf", rhoRef_);
}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
void Foam::wallShearStressWriter::write(const objectRegistry& obr)
{
  const fvMesh& mesh = refCast<const fvMesh>(obr);
  
  volVectorField wallShearStress
    (
     IOobject
     (
      FIELD_NAME,
      obr.time().timeName(),
      mesh,
      IOobject::NO_READ,
      IOobject::NO_WRITE
      ),
     mesh,
     dimensionedVector
     (
      FIELD_NAME,
      //tdevRhoReff().dimensions() / tmagSf().dimensions(),
      sqr(dimLength)/sqr(dimTime),
      vector::zero
      )
     );
 
  bool foundField = true;
  tmp<volSymmTensorField> tdevRhoReff = devRhoReff(obr, foundField);
 
  if (foundField) {
    const volSymmTensorField::GeometricBoundaryField& devRhoReffb =
      tdevRhoReff().boundaryField();
 
    tmp<surfaceScalarField> tmagSf = mesh.magSf();
    const surfaceScalarField::GeometricBoundaryField& magSfb =
      tmagSf().boundaryField();
 
    volVectorField::GeometricBoundaryField& wShearStressb =
      wallShearStress.boundaryField();
    const surfaceVectorField::GeometricBoundaryField& Sfb =
      mesh.Sf().boundaryField();
    const fvPatchList& patches = mesh.boundary();
    
    forAll(patches, patchi)
      {
        const fvPatch& currPatch = patches[patchi];
        
        if (isA<wallFvPatch>(currPatch))
          {
            vectorField& wssp = wShearStressb[patchi];
            wssp =
              (Sfb[patchi]/magSfb[patchi]) & devRhoReffb[patchi];
            
            writeStatistics(wssp, currPatch.name(), FIELD_NAME);
          }
      }
  }
 
  wallShearStress.write();
}
 
 
// ************************************************************************* //