wallFunctionCoefficients.C

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License
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#include "wallFunctionCoefficients.H"
#include "dictionary.H"
#include "MinMax.H"
 
// * * * * * * * * * * * * * * * Local Functions * * * * * * * * * * * * * * //
 
namespace Foam
{
 
//- Estimate the y+ at the intersection of the two sublayers
static scalar calcYPlusLam
(
    const scalar kappa,
    const scalar E
)
{
    scalar ypl = 11;
 
    for (int iter = 0; iter < 10; ++iter)
    {
        ypl = log(max(E*ypl, scalar(1)))/kappa;
    }
 
    return ypl;
}
 
}  // End namespace Foam
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::wallFunctionCoefficients::wallFunctionCoefficients()
:
    Cmu_(0.09),
    kappa_(0.41),
    E_(9.8),
    yPlusLam_(calcYPlusLam(kappa_, E_))
{}
 
 
Foam::wallFunctionCoefficients::wallFunctionCoefficients
(
    const dictionary& dict
)
:
    Cmu_(dict.getOrDefault<scalar>("Cmu", 0.09)),
    kappa_
    (
        dict.getCheckOrDefault<scalar>("kappa", 0.41, scalarMinMax::ge(SMALL))
    ),
    E_(dict.getCheckOrDefault<scalar>("E", 9.8, scalarMinMax::ge(SMALL))),
    yPlusLam_(calcYPlusLam(kappa_, E_))
{}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
void Foam::wallFunctionCoefficients::writeEntries
(
    Ostream& os
) const
{
    os.writeEntryIfDifferent<scalar>("Cmu", 0.09, Cmu_);
    os.writeEntryIfDifferent<scalar>("kappa", 0.41, kappa_);
    os.writeEntryIfDifferent<scalar>("E", 9.8, E_);
}
 
 
// ************************************************************************* //