KochFriedlanderSintering.H

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Class
    Foam::fv::KochFriedlanderSintering
 
Description
    Sintering model of Koch and Friedlander (1990). The characteristic time for
    sintering is given by
 
    \f[
        \tau = c_s d_{p_i}^n T^m \exp(T_a/T \cdot [1 - d_{p,min}/d_{p_i}])\;.
    \f]
 
    Note that the correction factor in the exponential function can be
    eliminated by setting \f$d_{p,min}\f$ to zero which is done by default.
 
    Reference:
    \verbatim
        Koch, W., & Friedlander, S. K. (1990).
        The effect of particle coalescence on the surface area of a coagulating
        aerosol.
        Journal of Colloid and Interface Science, 140(2), 419-427.
    \endverbatim
 
Usage
    \table
        Property | Description                | Required    | Default value
        Cs       | Sintering time coefficient | yes         | none
        n        | Particle diameter exponent | yes         | none
        m        | Temperature exponent       | yes         | none
        Ta       | Activation temperature     | yes         | none
        dpMin    | Minimum primary particle diameter | no   | 0
    \endtable
 
    Example usage:
    \verbatim
    sintering
    {
        type            KochFriedlanderSintering;
        libs            ("libmultiphaseEulerFvModels.so");
 
        populationBalance aggregates;
 
        Cs              8.3e24;
        n               4.0;
        m               1.0;
        Ta              3700.0;
    }
    \endverbatim
 
SourceFiles
    KochFriedlanderSintering.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef KochFriedlanderSintering_H
#define KochFriedlanderSintering_H
 
#include "populationBalanceModel.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace fv
{
 
/*---------------------------------------------------------------------------*\
                 Class KochFriedlanderSintering Declaration
\*---------------------------------------------------------------------------*/
 
class KochFriedlanderSintering
:
    public fvModel
{
private:
 
    // Private Data
 
        //- Population balance model
        const diameterModels::populationBalanceModel& popBal_;
 
        //- Sintering time primary particle diameter exponent
        scalar n_;
 
        //- Sintering time temperature exponent
        scalar m_;
 
        //- Sintering time coefficient
        dimensionedScalar Cs_;
 
        //- Activation temperature
        dimensionedScalar Ta_;
 
        //- Minimum primary particle diameter, defaults to Zero
        dimensionedScalar dpMin_;
 
        //- Map from the name of the surface-area-volume-ratio fields to the
        //  index of the size group
        HashTable<label> kappaNameToSizeGroupIndices_;
 
 
    // Private Member Functions
 
        //- Return the dimensions of the sintering time coefficient
        dimensionSet CsDims() const;
 
        //- Non-virtual read
        void readCoeffs(const dictionary& dict);
 
 
public:
 
    //- Runtime type information
    TypeName("KochFriedlanderSintering");
 
 
    // Constructors
 
        //- Construct from explicit source name and mesh
        KochFriedlanderSintering
        (
            const word& name,
            const word& modelType,
            const fvMesh& mesh,
            const dictionary& dict
        );
 
 
    // Member Functions
 
        // Checks
 
            //- Return true if the fvModel adds a source term to the given
            //  field's transport equation
            virtual bool addsSupToField(const word& fieldName) const;
 
 
        // Sources
 
            //- Return the characteristic time for sintering
            virtual tmp<volScalarField::Internal> tau
            (
                const volScalarField::Internal& kappa
            ) const;
 
            //- Add a source term to the surface-area-volume-ratio equation
            void addSup
            (
                const volScalarField& alphaFi,
                const volScalarField& rho,
                const volScalarField& kappa,
                fvMatrix<scalar>& eqn
            ) const;
 
 
        // Mesh changes
 
            //- Update for mesh motion
            virtual bool movePoints();
 
            //- Update topology using the given map
            virtual void topoChange(const polyTopoChangeMap&);
 
            //- Update from another mesh using the given map
            virtual void mapMesh(const polyMeshMap&);
 
            //- Redistribute or update using the given distribution map
            virtual void distribute(const polyDistributionMap&);
 
 
        // IO
 
            //- Read source dictionary
            virtual bool read(const dictionary& dict);
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace fv
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //