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 quadratic-upwind differencing scheme.
32 Note that the weighting factors are not bounded between upwind and
33 central-differencing, some downwind contribution is possible although
34 the interpolate is limited to be between the upwind and downwind cell
37 Used in conjunction with the template class LimitedScheme.
42 \*---------------------------------------------------------------------------*/
49 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
54 /*---------------------------------------------------------------------------*\
55 Class QUICKVLimiter Declaration
56 \*---------------------------------------------------------------------------*/
58 template<class LimiterFunc>
66 QUICKVLimiter(Istream&)
71 const scalar cdWeight,
72 const scalar faceFlux,
73 const typename LimiterFunc::phiType& phiP,
74 const typename LimiterFunc::phiType& phiN,
75 const typename LimiterFunc::gradPhiType& gradcP,
76 const typename LimiterFunc::gradPhiType& gradcN,
80 vector gradfV = phiN - phiP;
82 scalar phiCD = gradfV & (cdWeight*phiP + (1 - cdWeight)*phiN);
89 phif = 0.5*(phiCD + phiU + (1 - cdWeight)*(gradfV & (d & gradcP)));
94 phif = 0.5*(phiCD + phiU - cdWeight*(gradfV & (d & gradcN)));
97 // Calculate the effective limiter for the QUICK interpolation
98 scalar QLimiter = (phif - phiU)/stabilise(phiCD - phiU, SMALL);
100 // Limit the limiter between upwind and downwind
101 return max(min(QLimiter, 2), 0);
106 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
108 } // End namespace Foam
110 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
114 // ************************************************************************* //