zhyang-dev/openfoam
1
0
Fork 0
mirror of https://develop.openfoam.com/Development/openfoam.git synced 2025-11-28 03:28:01 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Update to compressible omegaWallFunction

Browse Source 
Changed the evaluation of omega to be a function of both omega in the viscous
sublayer and omega in the log region
This commit is contained in:
andy
2009-12-11 17:39:49 +00:00
parent 87f05dd72f
commit f04cdab21d
2 changed files with 31 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
src/turbulenceModels/compressible/RAS/derivedFvPatchFields/wallFunctions/omegaWallFunctions/omegaWallFunction/omegaWallFunctionFvPatchScalarField.C
View File

@ -79,6 +79,7 @@ void omegaWallFunctionFvPatchScalarField::writeLocalEntries(Ostream& os) const
os.writeKeyword("Cmu") << Cmu_ << token::END_STATEMENT << nl; os.writeKeyword("Cmu") << Cmu_ << token::END_STATEMENT << nl;
os.writeKeyword("kappa") << kappa_ << token::END_STATEMENT << nl; os.writeKeyword("kappa") << kappa_ << token::END_STATEMENT << nl;
os.writeKeyword("E") << E_ << token::END_STATEMENT << nl; os.writeKeyword("E") << E_ << token::END_STATEMENT << nl;
os.writeKeyword("beta1") << beta1_ << token::END_STATEMENT << nl;
} }
@ -95,6 +96,7 @@ omegaWallFunctionFvPatchScalarField::omegaWallFunctionFvPatchScalarField
Cmu_(0.09), Cmu_(0.09),
kappa_(0.41), kappa_(0.41),
E_(9.8), E_(9.8),
beta1_(0.075),
yPlusLam_(calcYPlusLam(kappa_, E_)) yPlusLam_(calcYPlusLam(kappa_, E_))
{ {
@ -115,6 +117,7 @@ omegaWallFunctionFvPatchScalarField::omegaWallFunctionFvPatchScalarField
Cmu_(ptf.Cmu_), Cmu_(ptf.Cmu_),
kappa_(ptf.kappa_), kappa_(ptf.kappa_),
E_(ptf.E_), E_(ptf.E_),
beta1_(ptf.beta1_),
yPlusLam_(ptf.yPlusLam_) yPlusLam_(ptf.yPlusLam_)
{ {
checkType(); checkType();
@ -133,6 +136,7 @@ omegaWallFunctionFvPatchScalarField::omegaWallFunctionFvPatchScalarField
Cmu_(dict.lookupOrDefault<scalar>("Cmu", 0.09)), Cmu_(dict.lookupOrDefault<scalar>("Cmu", 0.09)),
kappa_(dict.lookupOrDefault<scalar>("kappa", 0.41)), kappa_(dict.lookupOrDefault<scalar>("kappa", 0.41)),
E_(dict.lookupOrDefault<scalar>("E", 9.8)), E_(dict.lookupOrDefault<scalar>("E", 9.8)),
beta1_(dict.lookupOrDefault<scalar>("beta1", 0.075)),
yPlusLam_(calcYPlusLam(kappa_, E_)) yPlusLam_(calcYPlusLam(kappa_, E_))
{ {
checkType(); checkType();
@ -149,6 +153,7 @@ omegaWallFunctionFvPatchScalarField::omegaWallFunctionFvPatchScalarField
Cmu_(owfpsf.Cmu_), Cmu_(owfpsf.Cmu_),
kappa_(owfpsf.kappa_), kappa_(owfpsf.kappa_),
E_(owfpsf.E_), E_(owfpsf.E_),
beta1_(owfpsf.beta1_),
yPlusLam_(owfpsf.yPlusLam_) yPlusLam_(owfpsf.yPlusLam_)
{ {
checkType(); checkType();
@ -166,6 +171,7 @@ omegaWallFunctionFvPatchScalarField::omegaWallFunctionFvPatchScalarField
Cmu_(owfpsf.Cmu_), Cmu_(owfpsf.Cmu_),
kappa_(owfpsf.kappa_), kappa_(owfpsf.kappa_),
E_(owfpsf.E_), E_(owfpsf.E_),
beta1_(owfpsf.beta1_),
yPlusLam_(owfpsf.yPlusLam_) yPlusLam_(owfpsf.yPlusLam_)
{ {
@ -222,7 +228,11 @@ void omegaWallFunctionFvPatchScalarField::updateCoeffs()
Cmu25*y[faceI]*sqrt(k[faceCellI]) Cmu25*y[faceI]*sqrt(k[faceCellI])
/(muw[faceI]/rhow[faceI]); /(muw[faceI]/rhow[faceI]);
omega[faceCellI] = sqrt(k[faceCellI])/(Cmu25*kappa_*y[faceI]); scalar omegaVis = 6.0*muw[faceI]/(rhow[faceI]*beta1_*sqr(y[faceI]));
scalar omegaLog = sqrt(k[faceCellI])/(Cmu25*kappa_*y[faceI]);
omega[faceCellI] = sqrt(sqr(omegaVis) + sqr(omegaLog));
if (yPlus > yPlusLam_) if (yPlus > yPlusLam_)
{ {

21
src/turbulenceModels/compressible/RAS/derivedFvPatchFields/wallFunctions/omegaWallFunctions/omegaWallFunction/omegaWallFunctionFvPatchScalarField.H
View File

@ -26,7 +26,23 @@ Class
Foam::compressible::RASModels::omegaWallFunctionFvPatchScalarField Foam::compressible::RASModels::omegaWallFunctionFvPatchScalarField
Description Description
Replaces functionality in wallFunctionsI.H Provides a wall function boundary condition/constraint on omega
Computed value is:
omega = sqrt(omega_vis^2 + omega_log^2)
where
omega_vis = omega in viscous region
omega_log = omega in logarithmic region
Model described by Eq.(15) of:
@verbatim
Menter, F., Esch, T.
"Elements of Industrial Heat Transfer Prediction"
16th Brazilian Congress of Mechanical Engineering (COBEM),
Nov. 2001
@endverbatim
SourceFiles SourceFiles
omegaWallFunctionFvPatchScalarField.C omegaWallFunctionFvPatchScalarField.C
@ -71,6 +87,9 @@ protected:
//- E coefficient //- E coefficient
scalar E_; scalar E_;
//- beta1 coefficient
scalar beta1_;
//- Y+ at the edge of the laminar sublayer //- Y+ at the edge of the laminar sublayer
scalar yPlusLam_; scalar yPlusLam_;