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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29 Class with limiter function which returns the limiter for the
30 UMIST differencing scheme.
32 Used in conjunction with the template class LimitedScheme.
37 \*---------------------------------------------------------------------------*/
44 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
49 /*---------------------------------------------------------------------------*\
50 Class UMISTLimiter Declaration
51 \*---------------------------------------------------------------------------*/
53 template<class LimiterFunc>
61 UMISTLimiter(Istream&)
66 const scalar cdWeight,
67 const scalar faceFlux,
68 const typename LimiterFunc::phiType& phiP,
69 const typename LimiterFunc::phiType& phiN,
70 const typename LimiterFunc::gradPhiType& gradcP,
71 const typename LimiterFunc::gradPhiType& gradcN,
75 scalar r = LimiterFunc::r
77 faceFlux, phiP, phiN, gradcP, gradcN, d
80 return max(min(min(min(2*r, 0.75*r + 0.25), 0.25*r + 0.75), 2), 0);
85 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
87 } // End namespace Foam
89 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
93 // ************************************************************************* //