geomDecomp.C
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25 
26 #include "geomDecomp.H"
27 
28 // * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
29 
31 (
32  const dictionary& decompositionDict,
33  const word& derivedType
34 )
35 :
36  decompositionMethod(decompositionDict),
37  geomDecomDict_(decompositionDict.optionalSubDict(derivedType + "Coeffs")),
38  n_(geomDecomDict_.lookup("n")),
39  delta_(readScalar(geomDecomDict_.lookup("delta"))),
40  rotDelta_(I)
41 {
42  // check that the case makes sense :
43 
44  if (nProcessors_ != n_.x()*n_.y()*n_.z())
45  {
47  << "Wrong number of processor divisions in geomDecomp:" << nl
48  << "Number of domains : " << nProcessors_ << nl
49  << "Wanted decomposition : " << n_
50  << exit(FatalError);
51  }
52 
53  scalar d = 1 - 0.5*delta_*delta_;
54  scalar d2 = sqr(d);
55 
56  scalar a = delta_;
57  scalar a2 = sqr(a);
58 
59  rotDelta_ = tensor
60  (
61  d2, -a*d, a,
62  a*d - a2*d, a*a2 + d2, -2*a*d,
63  a*d2 + a2, a*d - a2*d, d2 - a2
64  );
65 }
66 
67 
68 // ************************************************************************* //
#define readScalar
Definition: doubleScalar.C:38
geomDecomp(const dictionary &decompositionDict, const word &derivedType)
Construct given the decomposition dictionary.
Definition: geomDecomp.C:31
errorManipArg< error, int > exit(error &err, const int errNo=1)
Definition: errorManip.H:124
error FatalError
A list of keyword definitions, which are a keyword followed by any number of values (e...
Definition: dictionary.H:137
#define FatalErrorInFunction
Report an error message using Foam::FatalError.
Definition: error.H:319
dimensionedSymmTensor sqr(const dimensionedVector &dv)
const dictionary & optionalSubDict(const word &) const
Find and return a sub-dictionary if found.
Definition: dictionary.C:759
static const Identity< scalar > I
Definition: Identity.H:93
A class for handling words, derived from string.
Definition: word.H:59
Abstract base class for decomposition.
static const char nl
Definition: Ostream.H:265
Tensor< scalar > tensor
Tensor of scalars.
Definition: tensor.H:51