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September 11, 2009, 19:32 |
Near Wall treatment
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#1 |
Member
Sven Winkler
Join Date: May 2009
Posts: 70
Rep Power: 17 |
I am using OpenFOAM to calculate a turbulent channel flow with a Reynolds Stress Model using wall functions. Since my results are not quite what they should be, I am interested how OpenFOAM deals with the near wall region, because I think this could be the course for my bad results. So, my questions are:
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September 13, 2009, 21:57 |
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#2 |
Member
Sven Winkler
Join Date: May 2009
Posts: 70
Rep Power: 17 |
I found out that the gradient at the wall is somehow defined in fvPatchField.C. In the source Code of this file, it says:
Code:
// Return gradient at boundary template<class Type> Foam::tmp<Foam::Field<Type> > Foam::fvPatchField<Type>::snGrad() const { return (*this - patchInternalField())*patch_.deltaCoeffs(); } Code:
//- Return the face - cell distance coeffient // except for coupled patches for which the cell-centre // to coupled-cell-centre distance coeffient is returned const scalarField& deltaCoeffs() const; |
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