TroeFallOffFunctionI.H

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

// Construct from components
inline Foam::TroeFallOffFunction::TroeFallOffFunction
(
    const scalar alpha,
    const scalar Tsss,
    const scalar Ts,
    const scalar Tss
)
:
    alpha_(alpha),
    Tsss_(Tsss),
    Ts_(Ts),
    Tss_(Tss)
{}


// Construct from Istream
inline Foam::TroeFallOffFunction::TroeFallOffFunction(Istream& is)
:
    alpha_(readScalar(is.readBegin("TroeFallOffFunction(Istream&)"))),
    Tsss_(readScalar(is)),
    Ts_(readScalar(is)),
    Tss_(readScalar(is))
{
    is.readEnd("TroeFallOffFunction(Istream&)");
}


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

inline Foam::scalar Foam::TroeFallOffFunction::operator()
(
    const scalar T,
    const scalar Pr
) const
{
    scalar logFcent = log10
    (
        max
        (
            (1 - alpha_)*exp(-T/Tsss_) + alpha_*exp(-T/Ts_) + exp(-Tss_/T),
            SMALL
        )
    );

    scalar c = -0.4 - 0.67*logFcent;
    static const scalar d = 0.14;
    scalar n = 0.75 - 1.27*logFcent;

    scalar logPr = log10(max(Pr, SMALL));
    return pow(10.0, logFcent/(1.0 + sqr((logPr + c)/(n - d*(logPr + c)))));
}


// * * * * * * * * * * * * * * * Ostream Operator  * * * * * * * * * * * * * //

inline Foam::Ostream& Foam::operator<<
(
    Foam::Ostream& os,
    const Foam::TroeFallOffFunction& tfof
)
{
    os  << token::BEGIN_LIST
        << tfof.alpha_
        << token::SPACE << tfof.Tsss_
        << token::SPACE << tfof.Ts_
        << token::SPACE << tfof.Tss_
        << token::END_LIST;

    return os;
}


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