Euler.H

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/*---------------------------------------------------------------------------*\
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  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
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    \\  /    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::Euler
 
Description
    Euler-implicit integration scheme.
 
    \f[
        \Delta \phi = (A - B \phi^n) \frac{\Delta t}{1 + B \Delta t}
    \f]
 
\*---------------------------------------------------------------------------*/
 
#ifndef Euler_H
#define Euler_H
 
#include "integrationScheme.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace integrationSchemes
{
 
/*---------------------------------------------------------------------------*\
                           Class Euler Declaration
\*---------------------------------------------------------------------------*/
 
class Euler
:
    public integrationScheme
{
public:
 
    //- Runtime type information
    TypeName("Euler");
 
 
    // Constructors
 
        //- Construct
        Euler();
 
        //- Construct and return clone
        virtual autoPtr<integrationScheme> clone() const
        {
            return autoPtr<integrationScheme>(new Euler(*this));
        }
 
 
    //- Destructor
    virtual ~Euler();
 
 
    // 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 (using an Euler
        //  integration method)
        virtual scalar sumDtEff(const scalar dt, const scalar Beta) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace integrationSchemes
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //