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Initial conditions in physical space from energy spectrum |
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#1 |
Member
Aru
Join Date: Feb 2012
Location: Chennai, India
Posts: 40
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Hi,
For validation purpose, I want to simulate homogeneous isotropic turbulence using my code. Following literature, my initial conditions have a known one dimensional energy spectrum ![]() ![]() I have learnt that I have to proceed as follows.
However in step 3, how will I do the orthogonalization process ![]() ![]() ![]() |
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#2 |
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Filippo Maria Denaro
Join Date: Jul 2010
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#3 |
Member
Aru
Join Date: Feb 2012
Location: Chennai, India
Posts: 40
Rep Power: 14 ![]() |
Thank you for the response.
However, the document does not have any additional information than what I understand now. My problem is specific. I have the amplitude-wavenumber information (data) after transformation to Fourier space. With my limited knowledge, I don't know how to get ![]() |
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#4 |
Senior Member
Filippo Maria Denaro
Join Date: Jul 2010
Posts: 6,813
Rep Power: 73 ![]() ![]() ![]() |
using search function, you can find many posts in this forum about the initial conditions, for example:
http://www.cfd-online.com/Forums/mai...procedure.html |
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Tags |
energy spectrum, fourier transform, matlab |
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