1 /*---------------------------------------------------------------------------*\
3 \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
5 \\ / A nd | Copyright held by original author
7 -------------------------------------------------------------------------------
9 This file is part of OpenFOAM.
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13 Free Software Foundation; either version 2 of the License, or (at your
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29 Class with limiter function which returns the limiter for the
30 Gamma differencing scheme based on phict obtained from the LimiterFunc
33 Used in conjunction with the template class LimitedScheme.
38 \*---------------------------------------------------------------------------*/
45 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
50 /*---------------------------------------------------------------------------*\
51 Class GammaLimiter Declaration
52 \*---------------------------------------------------------------------------*/
54 template<class LimiterFunc>
63 GammaLimiter(Istream& is)
69 FatalIOErrorIn("GammaLimiter(Istream& is)", is)
70 << "coefficient = " << k_
71 << " should be >= 0 and <= 1"
72 << exit(FatalIOError);
75 // Rescale k_ to be >= 0 and <= 0.5 (TVD conformant)
76 // and avoid the /0 when k_ = 0
77 k_ = max(k_/2.0, SMALL);
82 const scalar cdWeight,
83 const scalar faceFlux,
84 const typename LimiterFunc::phiType& phiP,
85 const typename LimiterFunc::phiType& phiN,
86 const typename LimiterFunc::gradPhiType& gradcP,
87 const typename LimiterFunc::gradPhiType& gradcN,
91 scalar phict = LimiterFunc::phict
93 faceFlux, phiP, phiN, gradcP, gradcN, d
96 return min(max(phict/k_, 0), 1);
101 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
103 } // End namespace Foam
105 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
109 // ************************************************************************* //