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Forum: OpenFOAM Running, Solving & CFD

May 12, 2011, 13:30

Replies: 9

Problems with fft

Views: 3,103

Posted By Pascal_doran

Hi Elisabet, I'm doing FFT along 'z' axis...

Hi Elisabet,

I'm doing FFT along 'z' axis (1D) and I calculate the most interesting mode (n) from 0 to nz/2-1 or wavenumber (k = 2*pi*n/Lz). I have also the possibility to observe all the modes...

Forum: OpenFOAM Running, Solving & CFD

May 12, 2011, 10:55

Replies: 9

Problems with fft

Views: 3,103

Posted By Pascal_doran

Hi Elisabet, When I use FFTW I need 1D array...

Hi Elisabet,

When I use FFTW I need 1D array (standard C++) and volVectorField (I'm using 1D FFT on velocity vector):
for (int nzi = 0; nzi < nz; nzi++) // Écriture du nouveau champ...

Forum: OpenFOAM Running, Solving & CFD

May 11, 2011, 11:10

Replies: 9

Problems with fft

Views: 3,103

Posted By Pascal_doran

Fftw 2.1.5

Hi Elisabet,

The simplest solution I found was to link the public code FFTW 2.1.5 with OpenFOAM 1.6.x. All you need to do is modify your solver: option file and add a few line of code in order to...

Forum: OpenFOAM Running, Solving & CFD

November 15, 2010, 18:08

Replies: 9

Problems with fft

Views: 3,103

Posted By Pascal_doran

basic info with fft in OF

Hi Yvan,

Did you find a solution? I'm trying to implement 1D fft with the velocities in my solver and I'm not able to compile the solver...
kMesh, fft and complexField have not been declared the...

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