[ztdep]

Dear friends;
I have collect the u v w p every time step during the LES of turbulent flow, i can obtain the fluctuation u v w p, but how to obtain the turbulent energy spectrum from these data.
Thanks.

[Tobi]

http://www.cfd-online.com/Wiki/Turbu...kinetic_energy

[FMDenaro]

Originally Posted by ztdep

Dear friends;
I have collect the u v w p every time step during the LES of turbulent flow, i can obtain the fluctuation u v w p, but how to obtain the turbulent energy spectrum from these data.
Thanks.

I suggesting computing the 1D energy spectra along the homogeneous directions. That is done by performing the Fourier transform of the velocity components and plotting the squared modulus of the Fourier coefficient vs. the wavenumber