Usher.H

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License
    This file is part of OpenFOAM.
 
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Class
    Foam::packingDispersionModels::Usher
 
Description
    Usher packing dispersion model for sewage and mineral slurries,
    both cetrifugated and filtered.
 
    Reference:
    \verbatim
        Usher, S. P., Studer, L. J., Wall, R. C., & Scales, P. J. (2013).
        Characterisation of dewaterability from equilibrium
        and transient centrifugation test data.
        Chemical Engineering Science, 93, 277-291.
   \endverbatim
 
Usage
    Example usage for mineral slurry:
    \verbatim
        packingDispersionModel Usher;
 
        UsherCoeffs
        {
            alphaGel        0.1;
            alphap          0.8;
            alphacp         0.8;
            alphag          0;
            alphaMax        1;
            b1              2e-3;
            sigma01         3.18663;
            n1              11;
            b2              1;
        }
    \endverbatim
 
    Example usage for waste water:
    \verbatim
        packingDispersionModel Usher;
 
        UsherCoeffs
        {
            alphaGel        0.025;
            alphap          0.09;
            alphacp         0.63;
            alphag          0.01;
            alphaMax        0.63;
            b1              0.01;
            sigma01         225.534;
            n1              6.6;
            b2              0.01;
        }
    \endverbatim
 
SourceFiles
    Usher.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef Usher_H
#define Usher_H
 
#include "packingDispersionModel.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace packingDispersionModels
{
 
/*---------------------------------------------------------------------------*\
                           Class Usher Declaration
\*---------------------------------------------------------------------------*/
 
class Usher
:
    public packingDispersionModel
{
    // Private Data
 
        dimensionedScalar alphaGel_;
        dimensionedScalar alphap_;
        dimensionedScalar alphag_;
        dimensionedScalar alphacp_;
        dimensionedScalar alphaMax_;
        dimensionedScalar b1_;
        dimensionedScalar n1_;
        dimensionedScalar sigma01_;
        dimensionedScalar b2_;
        dimensionedScalar n2_;
        dimensionedScalar sigma02_;
 
 
    // Private member functions
 
        template<class T>
        inline auto sigma1(const T& alphad) const;
 
        template<class T>
        inline auto sigmaPrime1(const T& alphad) const;
 
        template<class T>
        inline auto sigma2(const T& alphad) const;
 
        template<class T>
        inline auto sigmaPrime2(const T& alphad) const;
 
 
public:
 
    //- Runtime type information
    TypeName("Usher");
 
 
    // Constructors
 
        //- Construct from components
        Usher
        (
            const dictionary& dict,
            const relativeVelocityModel& relativeVelocity
        );
 
 
    //- Destructor
    ~Usher();
 
 
    // Member Functions
 
        //- Return the derivative of the packing stress w.r.t. phase-fraction
        virtual tmp<volScalarField> sigmaPrime() const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace packingDispersionModels
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //