supersonicFreestreamFvPatchVectorField.H

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License
    This file is part of OpenFOAM.
 
    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
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    for more details.
 
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Class
    Foam::supersonicFreestreamFvPatchVectorField
 
Group
    grpInletBoundaryConditions grpOutletBoundaryConditions
 
Description
    This boundary condition provides a supersonic free-stream condition.
 
    - supersonic outflow is vented according to ???
    - supersonic inflow is assumed to occur according to the Prandtl-Meyer
      expansion process.
    - subsonic outflow is applied via a zero-gradient condition from inside
      the domain.
 
    \heading Patch usage
 
    \table
        Property     | Description             | Required    | Default value
        TName        | Temperature field name  | no          | T
        pName        | Pressure field name     | no          | p
        psiName      | Compressibility field name | no       | thermo:psi
        UInf         | free-stream velocity    | yes         |
        pInf         | free-stream pressure    | yes         |
        TInf         | free-stream temperature | yes         |
        gamma        | heat capacity ratio (cp/Cv) | yes     |
    \endtable
 
    Example of the boundary condition specification:
    \verbatim
    myPatch
    {
        type            supersonicFreestream;
        UInf            500;
        pInf            1e4;
        TInf            265;
        gamma           1.4;
    }
    \endverbatim
 
Note
    This boundary condition is ill-posed if the free-stream flow is normal
    to the boundary.
 
SourceFiles
    supersonicFreestreamFvPatchVectorField.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef supersonicFreestreamFvPatchVectorFields_H
#define supersonicFreestreamFvPatchVectorFields_H
 
#include "fvPatchFields.H"
#include "mixedFvPatchFields.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
           Class supersonicFreestreamFvPatchVectorField Declaration
\*---------------------------------------------------------------------------*/
 
class supersonicFreestreamFvPatchVectorField
:
    public mixedFvPatchVectorField
{
    // Private data
 
        //- Name of temperature field, default = "T"
        word TName_;
 
        //- Name of pressure field, default = "p"
        word pName_;
 
        //- Name of compressibility field field, default = "thermo:psi"
        word psiName_;
 
        //- Velocity of the free stream
        vector UInf_;
 
        //- Pressure of the free stream
        scalar pInf_;
 
        //- Temperature of the free stream
        scalar TInf_;
 
        //- Heat capacity ratio
        scalar gamma_;
 
 
public:
 
    //- Runtime type information
    TypeName("supersonicFreestream");
 
 
    // Constructors
 
        //- Construct from patch and internal field
        supersonicFreestreamFvPatchVectorField
        (
            const fvPatch&,
            const DimensionedField<vector, volMesh>&
        );
 
        //- Construct from patch, internal field and dictionary
        supersonicFreestreamFvPatchVectorField
        (
            const fvPatch&,
            const DimensionedField<vector, volMesh>&,
            const dictionary&
        );
 
        //- Construct by mapping given supersonicFreestreamFvPatchVectorField
        //  onto a new patch
        supersonicFreestreamFvPatchVectorField
        (
            const supersonicFreestreamFvPatchVectorField&,
            const fvPatch&,
            const DimensionedField<vector, volMesh>&,
            const fvPatchFieldMapper&
        );
 
        //- Construct as copy
        supersonicFreestreamFvPatchVectorField
        (
            const supersonicFreestreamFvPatchVectorField&
        );
 
        //- Construct and return a clone
        virtual tmp<fvPatchVectorField> clone() const
        {
            return tmp<fvPatchVectorField>
            (
                new supersonicFreestreamFvPatchVectorField(*this)
            );
        }
 
        //- Construct as copy setting internal field reference
        supersonicFreestreamFvPatchVectorField
        (
            const supersonicFreestreamFvPatchVectorField&,
            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 supersonicFreestreamFvPatchVectorField(*this, iF)
            );
        }
 
 
    // Member functions
 
        // Access
 
            //- Return the velocity at infinity
            const vector& UInf() const
            {
                return UInf_;
            }
 
            //- Return reference to the velocity at infinity to allow adjustment
            vector& UInf()
            {
                return UInf_;
            }
 
            //- Return the pressure at infinity
            scalar pInf() const
            {
                return pInf_;
            }
 
            //- Return reference to the pressure at infinity to allow adjustment
            scalar& pInf()
            {
                return pInf_;
            }
 
            //- Return the temperature at infinity
            scalar TInf() const
            {
                return TInf_;
            }
 
            //- Return reference to the temperature at infinity
            //  to allow adjustment
            scalar& TInf()
            {
                return TInf_;
            }
 
 
        // Evaluation functions
 
            //- Update the coefficients associated with the patch field
            virtual void updateCoeffs();
 
 
        //- Write
        virtual void write(Ostream&) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //