outletPhaseMeanVelocityFvPatchVectorField.H

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/*---------------------------------------------------------------------------*\
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License
    This file is part of OpenFOAM.
 
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Class
    Foam::outletPhaseMeanVelocityFvPatchVectorField
 
Group
    grpOutletBoundaryConditions
 
Description
    This boundary condition adjusts the velocity for the given phase to achieve
    the specified mean thus causing the phase-fraction to adjust according to
    the mass flow rate.
 
    Typical usage is as the outlet condition for a towing-tank ship simulation
    to maintain the outlet water level at the level as the inlet.
 
Usage
    \table
        Property     | Description             | Required    | Default value
        Umean        | mean velocity normal to the boundary [m/s] | yes |
        alpha        | phase-fraction field    | yes |
    \endtable
 
    Example of the boundary condition specification:
    \verbatim
    <patchName>
    {
        type            outletPhaseMeanVelocity;
        Umean           1.2;
        alpha           alpha.water;
        value           uniform (1.2 0 0);
    }
    \endverbatim
 
See also
    Foam::mixedFvPatchField
    Foam::variableHeightFlowRateInletVelocityFvPatchVectorField
 
SourceFiles
    outletPhaseMeanVelocityFvPatchVectorField.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef outletPhaseMeanVelocityFvPatchVectorField_H
#define outletPhaseMeanVelocityFvPatchVectorField_H
 
#include "mixedFvPatchFields.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
/*---------------------------------------------------------------------------*\
    Class outletPhaseMeanVelocityFvPatchVectorField Declaration
\*---------------------------------------------------------------------------*/
 
class outletPhaseMeanVelocityFvPatchVectorField
:
    public mixedFvPatchVectorField
{
    // Private data
 
        //- Inlet integral flow rate
        scalar Umean_;
 
        //- Name of the phase-fraction field
        word alphaName_;
 
 
public:
 
   //- Runtime type information
   TypeName("outletPhaseMeanVelocity");
 
 
   // Constructors
 
        //- Construct from patch and internal field
        outletPhaseMeanVelocityFvPatchVectorField
        (
            const fvPatch&,
            const DimensionedField<vector, volMesh>&
        );
 
        //- Construct from patch, internal field and dictionary
        outletPhaseMeanVelocityFvPatchVectorField
        (
            const fvPatch&,
            const DimensionedField<vector, volMesh>&,
            const dictionary&
        );
 
        //- Construct by mapping given
        //  outletPhaseMeanVelocityFvPatchVectorField
        //  onto a new patch
        outletPhaseMeanVelocityFvPatchVectorField
        (
            const outletPhaseMeanVelocityFvPatchVectorField&,
            const fvPatch&,
            const DimensionedField<vector, volMesh>&,
            const fvPatchFieldMapper&
        );
 
        //- Construct as copy
        outletPhaseMeanVelocityFvPatchVectorField
        (
            const outletPhaseMeanVelocityFvPatchVectorField&
        );
 
        //- Construct as copy setting internal field reference
        outletPhaseMeanVelocityFvPatchVectorField
        (
            const outletPhaseMeanVelocityFvPatchVectorField&,
            const DimensionedField<vector, volMesh>&
        );
 
        //- Return a clone
        virtual tmp<fvPatchField<vector>> clone() const
        {
            return fvPatchField<vector>::Clone(*this);
        }
 
        //- Clone with an internal field reference
        virtual tmp<fvPatchField<vector>> clone
        (
            const DimensionedField<vector, volMesh>& iF
        ) const
        {
            return fvPatchField<vector>::Clone(*this, iF);
        }
 
 
    // Member functions
 
        // Access
 
            //- Return the flux
            scalar Umean() const
            {
                return Umean_;
            }
 
            //- Return reference to the flux to allow adjustment
            scalar& Umean()
            {
                return Umean_;
            }
 
 
        //- Update the coefficients associated with the patch field
        virtual void updateCoeffs();
 
        //- Write
        virtual void write(Ostream&) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //