nutWallFunctionFvPatchScalarField.H

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/*---------------------------------------------------------------------------*\
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License
    This file is part of OpenFOAM.
 
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    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.
 
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    for more details.
 
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Class
    Foam::nutWallFunctionFvPatchScalarField
 
Group
    grpWallFunctions
 
Description
    This boundary condition provides a turbulent kinematic viscosity condition
    when using wall functions, based on turbulence kinetic energy.
    - replicates OpenFOAM v1.5 (and earlier) behaviour
 
    \heading Patch usage
 
    \table
        Property  | Description         | Required   | Default value
        Cmu       | Cmu coefficient     | no         | 0.09
        kappa     | Von Karman constant | no         | 0.41
        E         | E coefficient       | no         | 9.8
    \endtable
 
    Examples of the boundary condition specification:
    \verbatim
    myPatch
    {
        type            nutWallFunction;
        value           uniform 0.0;
    }
    \endverbatim
 
    Reference for the default model coefficients:
    \verbatim
        H. Versteeg, W. Malalasekera
        An Introduction to Computational Fluid Dynamics: The Finite Volume
        Method, subsection "3.5.2 k-epsilon model"
    \endverbatim
 
SeeAlso
    Foam::fixedValueFvPatchField
 
SourceFiles
    nutWallFunctionFvPatchScalarField.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef nutWallFunctionFvPatchScalarField_H
#define nutWallFunctionFvPatchScalarField_H
 
#include "fixedValueFvPatchFields.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
             Class nutWallFunctionFvPatchScalarField Declaration
\*---------------------------------------------------------------------------*/
 
class nutWallFunctionFvPatchScalarField
:
    public fixedValueFvPatchScalarField
{
protected:
 
    // Protected data
 
        //- Cmu coefficient
        scalar Cmu_;
 
        //- Von Karman constant
        scalar kappa_;
 
        //- E coefficient
        scalar E_;
 
        //- Y+ at the edge of the laminar sublayer
        scalar yPlusLam_;
 
 
    // Protected Member Functions
 
        //- Check the type of the patch
        virtual void checkType();
 
        //- Calculate the turbulence viscosity
        virtual tmp<scalarField> calcNut() const = 0;
 
        //- Write local wall function variables
        virtual void writeLocalEntries(Ostream&) const;
 
 
public:
 
    //- Runtime type information
    TypeName("nutWallFunction");
 
 
    // Constructors
 
        //- Construct from patch and internal field
        nutWallFunctionFvPatchScalarField
        (
            const fvPatch&,
            const DimensionedField<scalar, volMesh>&
        );
 
        //- Construct from patch, internal field and dictionary
        nutWallFunctionFvPatchScalarField
        (
            const fvPatch&,
            const DimensionedField<scalar, volMesh>&,
            const dictionary&
        );
 
        //- Construct by mapping given
        //  nutWallFunctionFvPatchScalarField
        //  onto a new patch
        nutWallFunctionFvPatchScalarField
        (
            const nutWallFunctionFvPatchScalarField&,
            const fvPatch&,
            const DimensionedField<scalar, volMesh>&,
            const fvPatchFieldMapper&
        );
 
        //- Construct as copy
        nutWallFunctionFvPatchScalarField
        (
            const nutWallFunctionFvPatchScalarField&
        );
 
        //- Construct as copy setting internal field reference
        nutWallFunctionFvPatchScalarField
        (
            const nutWallFunctionFvPatchScalarField&,
            const DimensionedField<scalar, volMesh>&
        );
 
 
    // Member functions
 
        //- Calculate the Y+ at the edge of the laminar sublayer
        static scalar yPlusLam(const scalar kappa, const scalar E);
 
        //- Calculate and return the yPlus at the boundary
        virtual tmp<scalarField> yPlus() const = 0;
 
 
        // Evaluation functions
 
            //- Update the coefficients associated with the patch field
            virtual void updateCoeffs();
 
 
        // I-O
 
            //- Write
            virtual void write(Ostream&) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //