massRosinRammler.C

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/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 2016 OpenFOAM Foundation
     \\/     M anipulation  |
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License
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#include "massRosinRammler.H"
#include "addToRunTimeSelectionTable.H"

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

namespace Foam
{
namespace distributionModels
{
    defineTypeNameAndDebug(massRosinRammler, 0);
    addToRunTimeSelectionTable(distributionModel, massRosinRammler, dictionary);
}
}

// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //

Foam::distributionModels::massRosinRammler::massRosinRammler
(
    const dictionary& dict,
    cachedRandom& rndGen
)
:
    distributionModel(typeName, dict, rndGen),
    minValue_(readScalar(distributionModelDict_.lookup("minValue"))),
    maxValue_(readScalar(distributionModelDict_.lookup("maxValue"))),
    d_(readScalar(distributionModelDict_.lookup("d"))),
    n_(readScalar(distributionModelDict_.lookup("n")))
{
    check();
}


Foam::distributionModels::massRosinRammler::massRosinRammler
(
    const massRosinRammler& p
)
:
    distributionModel(p),
    minValue_(p.minValue_),
    maxValue_(p.maxValue_),
    d_(p.d_),
    n_(p.n_)
{}


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

Foam::distributionModels::massRosinRammler::~massRosinRammler()
{}


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

Foam::scalar Foam::distributionModels::massRosinRammler::sample() const
{
    scalar d;

    // Re-sample if the calculated d is out of the physical range
    do
    {
        const scalar a = 3/n_ + 1;
        const scalar P = rndGen_.sample01<scalar>();
        const scalar x = invIncGamma(a, P);
        d = d_*pow(x, 1/n_);
    } while (d < minValue_ || d > maxValue_);

    return d;
}


Foam::scalar Foam::distributionModels::massRosinRammler::minValue() const
{
    return minValue_;
}


Foam::scalar Foam::distributionModels::massRosinRammler::maxValue() const
{
    return maxValue_;
}


Foam::scalar Foam::distributionModels::massRosinRammler::meanValue() const
{
    return d_;
}


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