UniformTable2.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
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
    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::Function2s::UniformTable
 
Description
    Tabulated property function that linearly interpolates between
    the uniformTable values.
 
Usage
    \table
        Property    | Description
        Tlow        | Lower temperature limit of the uniformTable
        Thigh       | Upper temperature limit of the uniformTable
        values      | Property values, assumed uniformly distributed
    \endtable
 
    Example for the density of water from 1 to 3bar and 280 to 350K
    \verbatim
    rho
    {
        type    uniformTable;
 
        low     (1e5 280);
        high    (3e5 350);
 
        values
        3 2
        (
            (991 992)
            (993 994)
            (995 996)
        );
    }
    \endverbatim
 
\*---------------------------------------------------------------------------*/
 
#ifndef UniformTable2_H
#define UniformTable2_H
 
#include "Function2.H"
#include "RectangularMatrix.H"
#include "Pair.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace Function2s
{
 
/*---------------------------------------------------------------------------*\
                            Class UniformTable Declaration
\*---------------------------------------------------------------------------*/
 
template<class Type>
class UniformTable
:
    public FieldFunction2<Type, UniformTable<Type>>
{
    // Private member data
 
        //- Lowest values in the table
        Pair<scalar> low_;
 
        //- Highest values in the table
        Pair<scalar> high_;
 
        //- Table values
        RectangularMatrix<Type> values_;
 
        //- x increment derived from low_, high_ and values_.m()
        scalar deltax_;
 
        //- y increment derived from low_, high_ and values_.n()
        scalar deltay_;
 
 
    // Private member functions
 
        inline void checkRange
        (
            scalar x,
            scalar ndx,
            label ix,
            scalar y,
            scalar ndy,
            label iy
        ) const;
 
 
public:
 
    //- Runtime type information
    TypeName("uniformTable");
 
 
    // Constructors
 
        //- Construct from name and dictionary
        UniformTable
        (
            const word& name,
            const unitConversions& units,
            const dictionary& dict
        );
 
 
    // Member Functions
 
        //- Return the non-uniform table of values
        const RectangularMatrix<Type>& values() const
        {
            return values_;
        }
 
        //- Evaluate the function and return the result
        virtual Type value(scalar x, scalar y) const;
 
        //- Evaluate the derivative of the function w.r.t. p
        Type dfdp(scalar p, scalar T) const;
 
        //- Evaluate the derivative of the function w.r.t. T
        Type dfdT(scalar p, scalar T) const;
 
        //- Write the function coefficients
        void write(Ostream& os, const unitConversions& units) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Function2s
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#ifdef NoRepository
    #include "UniformTable2.C"
#endif
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //