SaffmanMeiLift.H

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License
    This file is part of OpenFOAM.
 
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Class
    Foam::Lagrangian::SaffmanMeiLift
 
Description
    Lift model of Saffman (1965) as extended by Mei (1992). Applicable to
    spherical particles.
 
    References:
    \verbatim
        Saffman, P. G. T. (1965).
        The lift on a small sphere in a slow shear flow.
        Journal of fluid mechanics, 22(2), 385-400.
 
        Mei, R. (1992).
        An approximate expression for the shear lift force on a spherical
        particle at finite Reynolds number.
        International Journal of Multiphase Flow, 18(1), 145-147.
    \endverbatim
 
Usage
    Example specification:
    \verbatim
    <LagrangianModelName>
    {
        type        SaffmanMeiLift;
    }
    \endverbatim
 
SourceFiles
    SaffmanMeiLift.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef SaffmanMeiLift_H
#define SaffmanMeiLift_H
 
#include "cloudLagrangianModel.H"
#include "CloudDerivedField.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace Lagrangian
{
 
/*---------------------------------------------------------------------------*\
                          Class SaffmanMeiLift Declaration
\*---------------------------------------------------------------------------*/
 
class SaffmanMeiLift
:
    public LagrangianModel,
    private cloudLagrangianModel
{
private:
 
    // Private Member Functions
 
        //- Calculate the lift coefficient
        tmp<LagrangianSubTensorField> calcL
        (
            const LagrangianModelRef& model,
            const LagrangianSubMesh& subMesh
        ) const;
 
        //- Add a source term to the velocity equation
        void addUSup
        (
            const LagrangianSubVectorSubField& U,
            LagrangianEqn<vector>& eqn
        ) const;
 
 
public:
 
    //- Runtime type information
    TypeName("SaffmanMeiLift");
 
 
    // Public Data
 
        //- Lift force
        const CloudDerivedField<tensor>& L;
 
 
    // Constructors
 
        //- Construct from components
        SaffmanMeiLift
        (
            const word& name,
            const LagrangianMesh& mesh,
            const dictionary& modelDict,
            const dictionary& stateDict
        );
 
 
    // Member Functions
 
        //- Return the name of the velocity field
        virtual wordList addSupFields() const;
 
        //- Return true for the velocity or carrier velocity field
        virtual bool addsSupToField
        (
            const word& fieldName,
            const word& eqnFieldName
        ) const;
 
        //- Add a source term to the velocity equation
        virtual void addSup
        (
            const LagrangianSubScalarField& deltaT,
            const LagrangianSubVectorSubField& U,
            LagrangianEqn<vector>& eqn
        ) const;
 
        //- Add a source term to the momentum equation
        virtual void addSup
        (
            const LagrangianSubScalarField& deltaT,
            const LagrangianSubScalarSubField& vOrM,
            const LagrangianSubVectorSubField& U,
            LagrangianEqn<vector>& eqn
        ) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Lagrangian
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //