flowRateInletVelocityFvPatchVectorField.H

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    This file is part of OpenFOAM.
 
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    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
 
Class
    Foam::flowRateInletVelocityFvPatchVectorField
 
Description
    Velocity inlet boundary condition creating a velocity field with
    optionally specified profile normal to the patch adjusted to match the
    specified mass flow rate, volumetric flow rate or mean velocity.
 
    For a mass-based flux:
    - the flow rate should be provided in kg/s
    - if \c rho is "none" the flow rate is in m3/s
    - otherwise \c rho should correspond to the name of the density field
    - if the density field cannot be found in the database, the user must
      specify the inlet density using the \c rhoInlet entry
 
    For a volumetric-based flux:
    - the flow rate is in m3/s
 
Usage
    \table
        Property     | Description             | Required    | Default value
        massFlowRate | Mass flow rate [kg/s]   | no          |
        volumetricFlowRate | Volumetric flow rate [m^3/s]| no |
        meanVelocity | Mean velocity [m/s]| no |
        profile      | Velocity profile        | no          |
        rho          | Density field name      | no          | rho
        rhoInlet     | Inlet density           | no          |
        alpha        | Volume fraction field name | no       |
    \endtable
 
    Example of the boundary condition specification for a volumetric flow rate:
    \verbatim
    <patchName>
    {
        type                flowRateInletVelocity;
        volumetricFlowRate  0.2;
        profile             laminarBL;
    }
    \endverbatim
 
    Example of the boundary condition specification for a mass flow rate:
     \verbatim
    <patchName>
    {
        type                flowRateInletVelocity;
        massFlowRate        0.2;
        profile             turbulentBL;
        rho                 rho;
        rhoInlet            1.0;
    }
    \endverbatim
 
    Example of the boundary condition specification for a volumetric flow rate:
    \verbatim
    <patchName>
    {
        type                flowRateInletVelocity;
        meanVelocity        5;
        profile             turbulentBL;
    }
    \endverbatim
 
    The \c volumetricFlowRate, \c massFlowRate or \c meanVelocity entries are
    \c Function1 of time, see Foam::Function1s.
 
    The \c profile entry is a \c Function1 of the normalised distance to the
    wall.  Any suitable Foam::Function1s can be used including
    Foam::Function1s::codedFunction1 but Foam::Function1s::laminarBL and
    Foam::Function1s::turbulentBL have been created specifically for this
    purpose and are likely to be appropriate for most cases.
 
    Note:
      - \c rhoInlet is required for the case of a mass flow rate, where the
        density field is not available at start-up
      - The value is positive into the domain (as an inlet)
      - May not work correctly for transonic inlets
      - Strange behaviour with potentialFoam since the U equation is not solved
 
See also
    Foam::fixedValueFvPatchField
    Foam::Function1s::laminarBL
    Foam::Function1s::turbulentBL
    Foam::Function1s
    Foam::flowRateOutletVelocityFvPatchVectorField
 
SourceFiles
    flowRateInletVelocityFvPatchVectorField.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef flowRateInletVelocityFvPatchVectorField_H
#define flowRateInletVelocityFvPatchVectorField_H
 
#include "fixedValueFvPatchFields.H"
#include "Function1.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
           Class flowRateInletVelocityFvPatchVectorField Declaration
\*---------------------------------------------------------------------------*/
 
class flowRateInletVelocityFvPatchVectorField
:
    public fixedValueFvPatchVectorField
{
    // Private Data
 
        //- Inlet integral flow rate
        autoPtr<Function1<scalar>> flowRate_;
 
        //- Optional velocity profile
        autoPtr<Function1<scalar>> profile_;
 
        //- Is the flow-rate mean velocity?
        bool meanVelocity_;
 
        //- Is the flow-rate volumetric?
        bool volumetric_;
 
        //- Name of the density field used to normalise the mass flux
        word rhoName_;
 
        //- Rho initialisation value (for start; if value not supplied)
        scalar rhoInlet_;
 
        //- Name of the volume fraction field used to convert to interstitial
        //  velocity
        word alphaName_;
 
        //- Normalised distance to the wall
        scalarField y_;
 
        //- Total area of patch
        scalar area_;
 
 
    // Private Member Functions
 
        //- Set the wall distance field y_
        void setWallDist();
 
        //- Return the normalised velocity profile
        virtual tmp<scalarField> profile();
 
        //- Update the patch values given the appropriate volume fraction and
        //  density types and values
        template<class ScaleType, class AlphaType, class RhoType>
        void updateValues
        (
            const ScaleType& scale,
            const AlphaType& alpha,
            const RhoType& rho
        );
 
        //- Update the patch values given the appropriate volume fraction type
        //  and values
        template<class AlphaType>
        void updateValues(const AlphaType& alpha);
 
        //- Return whether the flow rate can be evaluated on this case (i.e.,
        //  is not a non-parallel processor case)
        bool canEvaluate();
 
 
public:
 
   //- Runtime type information
   TypeName("flowRateInletVelocity");
 
 
   // Constructors
 
        //- Construct from patch, internal field and dictionary
        flowRateInletVelocityFvPatchVectorField
        (
            const fvPatch&,
            const DimensionedField<vector, volMesh>&,
            const dictionary&
        );
 
        //- Construct by mapping given
        //  flowRateInletVelocityFvPatchVectorField
        //  onto a new patch
        flowRateInletVelocityFvPatchVectorField
        (
            const flowRateInletVelocityFvPatchVectorField&,
            const fvPatch&,
            const DimensionedField<vector, volMesh>&,
            const fvPatchFieldMapper&
        );
 
        //- Disallow copy without setting internal field reference
        flowRateInletVelocityFvPatchVectorField
        (
            const flowRateInletVelocityFvPatchVectorField&
        ) = delete;
 
        //- Copy constructor setting internal field reference
        flowRateInletVelocityFvPatchVectorField
        (
            const flowRateInletVelocityFvPatchVectorField&,
            const DimensionedField<vector, volMesh>&
        );
 
        //- Construct and return a clone setting internal field reference
        virtual tmp<fvPatchVectorField> clone
        (
            const DimensionedField<vector, volMesh>& iF
        ) const
        {
            return tmp<fvPatchVectorField>
            (
                new flowRateInletVelocityFvPatchVectorField(*this, iF)
            );
        }
 
 
    // Member Functions
 
        // Mapping functions
 
            //- Map the given fvPatchField onto this fvPatchField
            virtual void map
            (
                const fvPatchVectorField&,
                const fvPatchFieldMapper&
            );
 
            //- Reset the fvPatchField to the given fvPatchField
            //  Used for mesh to mesh mapping
            virtual void reset(const fvPatchVectorField&);
 
 
        // Evaluation functions
 
            //- Update the coefficients associated with the patch field
            virtual void updateCoeffs();
 
 
        // I-O
 
            //- Write
            virtual void write(Ostream&) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //