analytical.C

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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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    under the terms of the GNU General Public License as published by
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    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
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#include "analytical.H"
#include "addToRunTimeSelectionTable.H"
 
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
namespace Foam
{
namespace integrationSchemes
{
    defineTypeNameAndDebug(analytical, 0);
    addToRunTimeSelectionTable(integrationScheme, analytical, word);
}
}
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::integrationSchemes::analytical::analytical()
{}
 
 
// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
 
Foam::integrationSchemes::analytical::~analytical()
{}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
Foam::scalar Foam::integrationSchemes::analytical::dtEff
(
    const scalar dt,
    const scalar Beta
) const
{
    return
        mag(Beta*dt) > SMALL
      ? (1 - exp(- Beta*dt))/Beta
      : dt;
}
 
 
Foam::scalar Foam::integrationSchemes::analytical::sumDtEff
(
    const scalar dt,
    const scalar Beta
) const
{
    return
        mag(Beta*dt) > SMALL
      ? dt/Beta - (1 - exp(- Beta*dt))/sqr(Beta)
      : sqr(dt);
}
 
 
// ************************************************************************* //