src/turbulenceModels/incompressible/RAS/derivedFvPatchFields/wallFunctions/omegaWallFunctions/omegaWallFunction/omegaWallFunctionFvPatchScalarField.C

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   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
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  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 \*---------------------------------------------------------------------------*/
  26
  27 #include "omegaWallFunctionFvPatchScalarField.H"
  28 #include "RASModel.H"
  29 #include "fvPatchFieldMapper.H"
  30 #include "volFields.H"
  31 #include "addToRunTimeSelectionTable.H"
  32
  33 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
  34
  35 namespace Foam
  36 {
  37 namespace incompressible
  38 {
  39 namespace RASModels
  40 {
  41
  42 // * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
  43
  44 void omegaWallFunctionFvPatchScalarField::checkType()
  45 {
  46     if (!patch().isWall())
  47     {
  48         FatalErrorIn("omegaWallFunctionFvPatchScalarField::checkType()")
  49             << "Invalid wall function specification" << nl
  50             << "    Patch type for patch " << patch().name()
  51             << " must be wall" << nl
  52             << "    Current patch type is " << patch().type() << nl << endl
  53             << abort(FatalError);
  54     }
  55 }
  56
  57
  58 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
  59
  60 omegaWallFunctionFvPatchScalarField::omegaWallFunctionFvPatchScalarField
  61 (
  62     const fvPatch& p,
  63     const DimensionedField<scalar, volMesh>& iF
  64 )
  65 :
  66     fixedInternalValueFvPatchField<scalar>(p, iF),
  67     UName_("U"),
  68     kName_("k"),
  69     GName_("RASModel::G"),
  70     nuName_("nu"),
  71     nutName_("nut"),
  72     Cmu_(0.09),
  73     kappa_(0.41),
  74     E_(9.8),
  75     beta1_(0.075)
  76 {
  77     checkType();
  78 }
  79
  80
  81 omegaWallFunctionFvPatchScalarField::omegaWallFunctionFvPatchScalarField
  82 (
  83     const omegaWallFunctionFvPatchScalarField& ptf,
  84     const fvPatch& p,
  85     const DimensionedField<scalar, volMesh>& iF,
  86     const fvPatchFieldMapper& mapper
  87 )
  88 :
  89     fixedInternalValueFvPatchField<scalar>(ptf, p, iF, mapper),
  90     UName_(ptf.UName_),
  91     kName_(ptf.kName_),
  92     GName_(ptf.GName_),
  93     nuName_(ptf.nuName_),
  94     nutName_(ptf.nutName_),
  95     Cmu_(ptf.Cmu_),
  96     kappa_(ptf.kappa_),
  97     E_(ptf.E_),
  98     beta1_(ptf.beta1_)
  99 {
 100     checkType();
 101 }
 102
 103
 104 omegaWallFunctionFvPatchScalarField::omegaWallFunctionFvPatchScalarField
 105 (
 106     const fvPatch& p,
 107     const DimensionedField<scalar, volMesh>& iF,
 108     const dictionary& dict
 109 )
 110 :
 111     fixedInternalValueFvPatchField<scalar>(p, iF, dict),
 112     UName_(dict.lookupOrDefault<word>("U", "U")),
 113     kName_(dict.lookupOrDefault<word>("k", "k")),
 114     GName_(dict.lookupOrDefault<word>("G", "RASModel::G")),
 115     nuName_(dict.lookupOrDefault<word>("nu", "nu")),
 116     nutName_(dict.lookupOrDefault<word>("nut", "nut")),
 117     Cmu_(dict.lookupOrDefault<scalar>("Cmu", 0.09)),
 118     kappa_(dict.lookupOrDefault<scalar>("kappa", 0.41)),
 119     E_(dict.lookupOrDefault<scalar>("E", 9.8)),
 120     beta1_(dict.lookupOrDefault<scalar>("beta1", 0.075))
 121 {
 122     checkType();
 123 }
 124
 125
 126 omegaWallFunctionFvPatchScalarField::omegaWallFunctionFvPatchScalarField
 127 (
 128     const omegaWallFunctionFvPatchScalarField& owfpsf
 129 )
 130 :
 131     fixedInternalValueFvPatchField<scalar>(owfpsf),
 132     UName_(owfpsf.UName_),
 133     kName_(owfpsf.kName_),
 134     GName_(owfpsf.GName_),
 135     nuName_(owfpsf.nuName_),
 136     nutName_(owfpsf.nutName_),
 137     Cmu_(owfpsf.Cmu_),
 138     kappa_(owfpsf.kappa_),
 139     E_(owfpsf.E_),
 140     beta1_(owfpsf.beta1_)
 141 {
 142     checkType();
 143 }
 144
 145
 146 omegaWallFunctionFvPatchScalarField::omegaWallFunctionFvPatchScalarField
 147 (
 148     const omegaWallFunctionFvPatchScalarField& owfpsf,
 149     const DimensionedField<scalar, volMesh>& iF
 150 )
 151 :
 152     fixedInternalValueFvPatchField<scalar>(owfpsf, iF),
 153     UName_(owfpsf.UName_),
 154     kName_(owfpsf.kName_),
 155     GName_(owfpsf.GName_),
 156     nuName_(owfpsf.nuName_),
 157     nutName_(owfpsf.nutName_),
 158     Cmu_(owfpsf.Cmu_),
 159     kappa_(owfpsf.kappa_),
 160     E_(owfpsf.E_),
 161     beta1_(owfpsf.beta1_)
 162 {
 163     checkType();
 164 }
 165
 166
 167 // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 168
 169 void omegaWallFunctionFvPatchScalarField::updateCoeffs()
 170 {
 171     if (updated())
 172     {
 173         return;
 174     }
 175
 176     // If G field is not present, execute zero gradient evaluation
 177     // HJ, 20/Mar/2011
 178     if (!db().foundObject<volScalarField>(GName_))
 179     {
 180         zeroGradientFvPatchScalarField::evaluate();
 181
 182         return;
 183     }
 184
 185     const RASModel& rasModel = db().lookupObject<RASModel>("RASProperties");
 186     const scalar yPlusLam = rasModel.yPlusLam(kappa_, E_);
 187     const scalarField& y = rasModel.y()[patch().index()];
 188
 189     const scalar Cmu25 = pow(Cmu_, 0.25);
 190
 191     volScalarField& G = const_cast<volScalarField&>
 192         (db().lookupObject<volScalarField>(GName_));
 193
 194     volScalarField& omega = const_cast<volScalarField&>
 195         (db().lookupObject<volScalarField>(dimensionedInternalField().name()));
 196
 197     const scalarField& k = db().lookupObject<volScalarField>(kName_);
 198
 199     const scalarField& nuw =
 200         patch().lookupPatchField<volScalarField, scalar>(nuName_);
 201
 202     const scalarField& nutw =
 203         patch().lookupPatchField<volScalarField, scalar>(nutName_);
 204
 205     const fvPatchVectorField& Uw =
 206         patch().lookupPatchField<volVectorField, vector>(UName_);
 207
 208     vectorField n = patch().nf();
 209
 210     const scalarField magGradUw = mag(Uw.snGrad());
 211
 212     // Set omega and G
 213     forAll(nutw, faceI)
 214     {
 215         label faceCellI = patch().faceCells()[faceI];
 216
 217         scalar yPlus = Cmu25*y[faceI]*sqrt(k[faceCellI])/nuw[faceI];
 218
 219         scalar omegaVis = 6.0*nuw[faceI]/(beta1_*sqr(y[faceI]));
 220
 221         scalar omegaLog = sqrt(k[faceCellI])/(Cmu25*kappa_*y[faceI]);
 222
 223         omega[faceCellI] = sqrt(sqr(omegaVis) + sqr(omegaLog));
 224
 225         if (yPlus > yPlusLam)
 226         {
 227             G[faceCellI] =
 228                 (nutw[faceI] + nuw[faceI])
 229                *magGradUw[faceI]
 230                *Cmu25*sqrt(k[faceCellI])
 231                /(kappa_*y[faceI]);
 232         }
 233         else
 234         {
 235             G[faceCellI] = 0.0;
 236         }
 237     }
 238
 239     // TODO: perform averaging for cells sharing more than one boundary face
 240
 241     fixedInternalValueFvPatchField<scalar>::updateCoeffs();
 242 }
 243
 244
 245 void omegaWallFunctionFvPatchScalarField::write(Ostream& os) const
 246 {
 247     fixedInternalValueFvPatchField<scalar>::write(os);
 248     writeEntryIfDifferent<word>(os, "U", "U", UName_);
 249     writeEntryIfDifferent<word>(os, "k", "k", kName_);
 250     writeEntryIfDifferent<word>(os, "G", "RASModel::G", GName_);
 251     writeEntryIfDifferent<word>(os, "nu", "nu", nuName_);
 252     writeEntryIfDifferent<word>(os, "nut", "nut", nutName_);
 253     os.writeKeyword("Cmu") << Cmu_ << token::END_STATEMENT << nl;
 254     os.writeKeyword("kappa") << kappa_ << token::END_STATEMENT << nl;
 255     os.writeKeyword("E") << E_ << token::END_STATEMENT << nl;
 256     os.writeKeyword("beta1") << beta1_ << token::END_STATEMENT << nl;
 257     writeEntry("value", os);
 258 }
 259
 260
 261 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 262
 263 makePatchTypeField
 264 (
 265     fvPatchScalarField,
 266     omegaWallFunctionFvPatchScalarField
 267 );
 268
 269 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 270
 271 } // End namespace RASModels
 272 } // End namespace incompressible
 273 } // End namespace Foam
 274
 275 // ************************************************************************* //