RosinRammler.C 2.69 KB
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/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
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    \\  /    A nd           | Copyright (C) 2004-2010 OpenCFD Ltd.
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     \\/     M anipulation  |
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.

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    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.
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    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
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    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
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\*---------------------------------------------------------------------------*/

#include "RosinRammler.H"
#include "addToRunTimeSelectionTable.H"

// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //

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namespace Foam
{
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    namespace pdfs
    {
        defineTypeNameAndDebug(RosinRammler, 0);
        addToRunTimeSelectionTable(pdf, RosinRammler, dictionary);
    }
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}
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// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //

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Foam::pdfs::RosinRammler::RosinRammler
(
    const dictionary& dict,
    cachedRandom& rndGen
)
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:
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    pdf(typeName, dict, rndGen),
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    minValue_(readScalar(pdfDict_.lookup("minValue"))),
    maxValue_(readScalar(pdfDict_.lookup("maxValue"))),
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    d_(readScalar(pdfDict_.lookup("d"))),
    n_(readScalar(pdfDict_.lookup("n")))
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{
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    check();
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}


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Foam::pdfs::RosinRammler::RosinRammler(const RosinRammler& p)
:
    pdf(p),
    minValue_(p.minValue_),
    maxValue_(p.maxValue_),
    d_(p.d_),
    n_(p.n_)
{}


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// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //

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Foam::pdfs::RosinRammler::~RosinRammler()
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{}


// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //

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Foam::scalar Foam::pdfs::RosinRammler::sample() const
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{
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    scalar K = 1.0 - exp(-pow((maxValue_ - minValue_)/d_, n_));
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    scalar y = rndGen_.sample01<scalar>();
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    scalar x = minValue_ + d_*::pow(-log(1.0 - y*K), 1.0/n_);
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    return x;
}

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Foam::scalar Foam::pdfs::RosinRammler::minValue() const
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{
    return minValue_;
}

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Foam::scalar Foam::pdfs::RosinRammler::maxValue() const
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{
    return maxValue_;
}


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// ************************************************************************* //