powerLawLopesdaCosta.H

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    Copyright (C) 2018 OpenFOAM Foundation
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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.
 
    You should have received a copy of the GNU General Public License
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Class
    Foam::porosityModels::powerLawLopesdaCosta
 
Description
    Variant of the power law porosity model with spatially varying
    drag coefficient
 
    given by:
 
        \f[
            S = -\rho C_d \Sigma |U|^{(C_1 - 1)} U
        \f]
 
    where
    \vartable
        \Sigma | Porosity surface area per unit volume
        C_d    | Model linear coefficient
        C_1    | Model exponent coefficient
    \endvartable
 
    Reference:
    \verbatim
        Costa, J. C. P. L. D. (2007).
        Atmospheric flow over forested and non-forested complex terrain.
    \endverbatim
 
See also
    Foam::RASModels::kEpsilonLopesdaCosta
 
SourceFiles
    powerLawLopesdaCosta.C
    powerLawLopesdaCostaTemplates.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef powerLawLopesdaCosta_H
#define powerLawLopesdaCosta_H
 
#include "porosityModel.H"
#include "Function1.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace porosityModels
{
 
/*---------------------------------------------------------------------------*\
                  Class powerLawLopesdaCostaZone Declaration
\*---------------------------------------------------------------------------*/
 
class powerLawLopesdaCostaZone
{
protected:
 
    // Protected data
 
        //- Automatically generated zone name for this porous zone
        const word zoneName_;
 
        //- Porosity surface area per unit volume zone field
        scalarField Sigma_;
 
 
public:
 
    //- Constructor
    powerLawLopesdaCostaZone
    (
        const word& name,
        const word& modelType,
        const fvMesh& mesh,
        const dictionary& dict
    );
 
    // Member Functions
 
        //- Return the porosity surface area per unit volume zone field
        const scalarField& Sigma() const;
};
 
 
/*---------------------------------------------------------------------------*\
                    Class powerLawLopesdaCosta Declaration
\*---------------------------------------------------------------------------*/
 
class powerLawLopesdaCosta
:
    public powerLawLopesdaCostaZone,
    public porosityModel
{
    // Private data
 
        //- Cd coefficient
        scalar Cd_;
 
        //- C1 coefficient
        scalar C1_;
 
        //- Name of density field
        word rhoName_;
 
 
    // Private Member Functions
 
        //- Apply resistance
        template<class RhoFieldType>
        void apply
        (
            scalarField& Udiag,
            const scalarField& V,
            const RhoFieldType& rho,
            const vectorField& U
        ) const;
 
        //- Apply resistance
        template<class RhoFieldType>
        void apply
        (
            tensorField& AU,
            const RhoFieldType& rho,
            const vectorField& U
        ) const;
 
 
        //- No copy construct
        powerLawLopesdaCosta(const powerLawLopesdaCosta&) = delete;
 
        //- No copy assignment
        void operator=(const powerLawLopesdaCosta&) = delete;
 
 
public:
 
    //- Runtime type information
    TypeName("powerLawLopesdaCosta");
 
    //- Constructor
    powerLawLopesdaCosta
    (
        const word& name,
        const word& modelType,
        const fvMesh& mesh,
        const dictionary& dict,
        const word& cellZoneName
    );
 
    //- Destructor
    virtual ~powerLawLopesdaCosta();
 
 
    // Member Functions
 
        //- Transform the model data wrt mesh changes
        virtual void calcTransformModelData();
 
        //- Calculate the porosity force
        virtual void calcForce
        (
            const volVectorField& U,
            const volScalarField& rho,
            const volScalarField& mu,
            vectorField& force
        ) const;
 
        //- Add resistance
        virtual void correct(fvVectorMatrix& UEqn) const;
 
        //- Add resistance
        virtual void correct
        (
            fvVectorMatrix& UEqn,
            const volScalarField& rho,
            const volScalarField& mu
        ) const;
 
        //- Add resistance
        virtual void correct
        (
            const fvVectorMatrix& UEqn,
            volTensorField& AU
        ) const;
 
 
    // I-O
 
        //- Write
        bool writeData(Ostream& os) const;
};
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace porosityModels
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#ifdef NoRepository
    #include "powerLawLopesdaCostaTemplates.C"
#endif
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //