lumpedMassTemperatureFvPatchScalarField.H

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License
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Class
    Foam::lumpedMassTemperatureFvPatchScalarField
 
Description
    This boundary condition is applied to a patch which bounds a solid body,
    wholly or partially.  It represents the body as a lumped mass, i.e. by a
    single temperature \c T which is fixed across the patch.  The body has a
    volume \c V which is either specified by the user, or is calculated when
    the patch describes a closed volume (including in 2D meshes). Starting from
    an initial, specified \c T, the change in temperature is calculated over
    time according to an applied power source \c Q and the heat transferred
    across the boundary \f$Q_{b}\f$ (positive into the lumped mass):
 
        \f[
             dT/dt = frac{Q + Q_{b}}{\rho C_{v} V}
        \f]
 
    where
    \vartable
        Q      | specified power source [W]
        Q_{b}  | total calculated heat transferred across the boundary [W]
        \rho   | density [kg/m^3]
        C_{v}  | specific heat capacity [J/(kg K)]
        V      | volume of the lumped mass [m^3}
    \endtable
 
Usage
    \table
        Property   | Description                  | Req'd? | Default
        rho        | density                      | yes    |
        Cv         | specific heat capacity       | yes    |
        T          | temperature                  | yes    |
        Q          | power source                 | no     | 0
        volume     | volume of the lumped mass    | no     | calculated
    \endtable
 
    Example of the boundary condition specification:
    \verbatim
    <patchName>
    {
        type       lumpedMassTemperature;
        rho        1000;
        Cv         1300;
        T          500;
        Q          constant 0.5;
        value      uniform $T; // placeholder
    }
    \endverbatim
 
SourceFiles
    lumpedMassTemperatureFvPatchScalarField.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef lumpedMassTemperatureFvPatchScalarField_H
#define lumpedMassTemperatureFvPatchScalarField_H
 
#include "fixedValueFvPatchFields.H"
#include "UniformDimensionedField.H"
#include "Function1.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
           Class lumpedMassTemperatureFvPatchScalarField Declaration
\*---------------------------------------------------------------------------*/
 
class lumpedMassTemperatureFvPatchScalarField
:
    public fixedValueFvPatchScalarField
{
    // Private Data
 
        //- Density
        const scalar rho_;
 
        //- Specific heat capacity
        const scalar Cv_;
 
        //- Temperature of the thermal mass
        UniformDimensionedField<scalar> T_;
 
        //- Heat source (optional)
        autoPtr<Function1<scalar>> Q_;
 
        //- Volume of the lumped mass, defaults when enclosed by the patch
        scalar V_;
 
 
    // Private Member Functions
 
        //- Does the patch form a closed volume, including in a 2D case?
        bool closed() const;
 
        //- Return volume formed by the enclosed patch
        scalar V() const;
 
 
public:
 
    //- Runtime type information
    TypeName("lumpedMassTemperature");
 
 
    // Constructors
 
        //- Construct from patch, internal field and dictionary
        lumpedMassTemperatureFvPatchScalarField
        (
            const fvPatch&,
            const DimensionedField<scalar, volMesh>&,
            const dictionary&
        );
 
        //- Construct by mapping given fixedValueTypeFvPatchField
        //  onto a new patch
        lumpedMassTemperatureFvPatchScalarField
        (
            const lumpedMassTemperatureFvPatchScalarField&,
            const fvPatch&,
            const DimensionedField<scalar, volMesh>&,
            const fieldMapper&
        );
 
        //- Disallow copy without setting internal field reference
        lumpedMassTemperatureFvPatchScalarField
        (
            const lumpedMassTemperatureFvPatchScalarField&
        ) = delete;
 
        //- Copy constructor setting internal field reference
        lumpedMassTemperatureFvPatchScalarField
        (
            const lumpedMassTemperatureFvPatchScalarField&,
            const DimensionedField<scalar, volMesh>&
        );
 
        //- Construct and return a clone setting internal field reference
        virtual tmp<fvPatchScalarField> clone
        (
            const DimensionedField<scalar, volMesh>& iF
        ) const
        {
            return tmp<fvPatchScalarField>
            (
                new lumpedMassTemperatureFvPatchScalarField
                (
                    *this,
                    iF
                )
            );
        }
 
 
    // Member Functions
 
        // Mapping functions
 
            //- Map the given fvPatchField onto this fvPatchField
            virtual void map(const fvPatchScalarField&, const fieldMapper&);
 
            //- Reset the fvPatchField to the given fvPatchField
            //  Used for mesh to mesh mapping
            virtual void reset(const fvPatchScalarField&);
 
 
        // Evaluation functions
 
            //- Update the coefficients associated with the patch field
            virtual void updateCoeffs();
 
 
        //- Write
        virtual void write(Ostream&) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
 
#endif
 
// ************************************************************************* //