FreeFOAM The Cross-Platform CFD Toolkit
limitedSnGrad.C
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10 
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23 
24 Description
25  snGrad scheme with limited non-orthogonal correction.
26 
27  The limiter is controlled by a coefficient with a value between 0 and 1
28  which when 0 switches the correction off and the scheme behaves as
29  uncorrectedSnGrad, when set to 1 the full correction is applied and the
30  scheme behaves as correctedSnGrad and when set to 0.5 the limiter is
31  calculated such that the non-orthogonal contribution does not exceed the
32  orthogonal part.
33 
34 \*---------------------------------------------------------------------------*/
35 
36 #include <finiteVolume/fv.H>
37 #include "limitedSnGrad.H"
38 #include <finiteVolume/volFields.H>
41 #include <finiteVolume/localMax.H>
42 
43 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
44 
45 namespace Foam
46 {
47 
48 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
49 
50 namespace fv
51 {
52 
53 // * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
54 
55 template<class Type>
57 {}
58 
59 
60 // * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
61 
62 template<class Type>
65 (
67 ) const
68 {
71 
73  (
74  min
75  (
76  limitCoeff_
77  *mag(snGradScheme<Type>::snGrad(vf, deltaCoeffs(vf), "orthSnGrad"))
78  /(
79  (1 - limitCoeff_)*mag(corr)
80  + dimensionedScalar("small", corr.dimensions(), SMALL)
81  ),
82  dimensionedScalar("one", dimless, 1.0)
83  )
84  );
85 
86  if (fv::debug)
87  {
88  Info<< "limitedSnGrad :: limiter min: " << min(limiter.internalField())
89  << " max: "<< max(limiter.internalField())
90  << " avg: " << average(limiter.internalField()) << endl;
91  }
92 
93  return limiter*corr;
94 }
95 
96 
97 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
98 
99 } // End namespace fv
100 
101 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
102 
103 } // End namespace Foam
104 
105 // ************************ vim: set sw=4 sts=4 et: ************************ //