RosinRammler.H

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License
    This file is part of OpenFOAM.
 
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    the Free Software Foundation, either version 3 of the License, or
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Class
    Foam::distributions::RosinRammler
 
Description
    Rosin-Rammler distribution, scaled so that it spans between a specified
    minimum and maximum value, rather than from zero to infinity
 
    \f[
        PDF(x) = \left( \frac{n}{d} \right) \left( \frac{x}{d} \right)^{n-1} \\
        \exp \left( - \left(\frac{x}{d} \right)^n \right)
    \f]
    \f[
        CDF(x) = 1 - \exp \left( - \left( \frac{x}{d} \right)^n \right)
    \f]
 
Usage
    Example usage:
    \verbatim
    {
        type    RosinRammler;
        Q       0;
        min     0.00001;
        max     0.00015;
        d       0.00014;
        n       2;
    }
    \endverbatim
 
SourceFiles
    RosinRammler.C
 
See also
    Foam::distribution
 
\*---------------------------------------------------------------------------*/
 
#ifndef RosinRammler_H
#define RosinRammler_H
 
#include "unintegrable.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace distributions
{
 
/*---------------------------------------------------------------------------*\
                        Class RosinRammler Declaration
\*---------------------------------------------------------------------------*/
 
class RosinRammler
:
    public FieldDistribution<unintegrableForNonZeroQ, RosinRammler>
{
    // Private Data
 
        //- Minimum value
        const scalar min_;
 
        //- Maximum value
        const scalar max_;
 
        //- Scale parameter
        const scalar d_;
 
        //- Shape parameter
        const scalar n_;
 
 
protected:
 
    // Protected Member Functions
 
        //- Return values of the un-normalised PDF for the given size exponent
        //  and x-coordinates.
        virtual tmp<scalarField> phi
        (
            const label q,
            const scalarField& x
        ) const;
 
        //- Return values of the un-normalised CDF for the given size exponent
        //  and x-coordinates.
        virtual tmp<scalarField> Phi
        (
            const label q,
            const scalarField& x
        ) const;
 
 
public:
 
    //- Runtime type information
    TypeName("RosinRammler");
 
 
    // Constructors
 
        //- Construct from a dictionary
        RosinRammler
        (
            const unitConversion& units,
            const dictionary& dict,
            const label sampleQ,
            randomGenerator&& rndGen
        );
 
        //- Construct copy
        RosinRammler(const RosinRammler& d, const label sampleQ);
 
        //- Construct and return a clone
        virtual autoPtr<distribution> clone(const label sampleQ) const
        {
            return autoPtr<distribution>(new RosinRammler(*this, sampleQ));
        }
 
 
    //- Destructor
    virtual ~RosinRammler();
 
 
    // Member Functions
 
        //- Sample the distribution
        virtual scalar sample() const;
 
        //- Sample the distribution
        using FieldDistribution<unintegrableForNonZeroQ, RosinRammler>::sample;
 
        //- Return the minimum value
        virtual scalar min() const;
 
        //- Return the maximum value
        virtual scalar max() const;
 
        //- Write to a stream
        virtual void write(Ostream& os, const unitConversion& units) const;
 
        //- Return coordinates to plot across the range of the distribution
        virtual tmp<scalarField> x(const label n) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace distributions
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //