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BUG: fftw: missing normalisation. See #867.

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This commit is contained in:
mattijs
2018-06-13 14:09:37 +01:00
parent 51c48fa9c9
commit 765c2051aa
3 changed files with 17 additions and 3 deletions
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2
applications/solvers/DNS/dnsFoam/dnsFoam.C
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@ -66,7 +66,7 @@ int main(int argc, char *argv[])
fft::reverseTransform
(
K/(mag(K) + 1.0e-6) ^ forceGen.newField(), K.nn()
)
)*recRootN
);
#include "globalProperties.H"

7
applications/solvers/DNS/dnsFoam/readTurbulenceProperties.H
View File

@ -19,3 +19,10 @@
Kmesh K(mesh);
UOprocess forceGen(K, runTime.deltaTValue(), turbulenceProperties);
label ntot = 1;
forAll(K.nn(), idim)
{
ntot *= K.nn()[idim];
}
const scalar recRootN = 1.0/Foam::sqrt(scalar(ntot));