analytical.H

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/*---------------------------------------------------------------------------*\
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  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | www.openfoam.com
     \\/     M anipulation  |
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    Copyright (C) 2011-2017 OpenFOAM Foundation
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.
 
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Class
    Foam::integrationSchemes::analytical
 
Description
    Analytical integration scheme
 
    \f[
        \Delta \phi = (A - B \phi^n) \frac{1}{B} (1 - e^{- B \Delta t})
    \f]
 
\*---------------------------------------------------------------------------*/
 
#ifndef analytical_H
#define analytical_H
 
#include "integrationScheme.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace integrationSchemes
{
 
/*---------------------------------------------------------------------------*\
                         Class analytical Declaration
\*---------------------------------------------------------------------------*/
 
class analytical
:
    public integrationScheme
{
public:
 
    //- Runtime type information
    TypeName("analytical");
 
 
    // Constructors
 
        //- Construct
        analytical();
 
        //- Construct and return clone
        virtual autoPtr<integrationScheme> clone() const
        {
            return autoPtr<integrationScheme>(new analytical(*this));
        }
 
 
    //- Destructor
    virtual ~analytical();
 
 
    // Member Functions
 
        //- Return the integration effective time step
        virtual scalar dtEff(const scalar dt, const scalar Beta) const;
 
        //- Return the integral of the effective time step
        virtual scalar sumDtEff(const scalar dt, const scalar Beta) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace integrationSchemes
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //