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Forum: Main CFD Forum

July 17, 2012, 13:30

Replies: 2

Orszag 2/3 rule

Views: 1,833

Posted By Eifoehn4

That would mean i have to use such a filter: ...

That would mean i have to use such a filter:

- 2D example
- high modes are concentrated in the middle after using FFT (FFTW)

(like a cross)

D_{Filter}=\begin{pmatrix}
1 & 1 & 1 & 0 & 0...

Forum: Main CFD Forum

July 16, 2012, 09:58

Replies: 2

Orszag 2/3 rule

Views: 1,833

Posted By Eifoehn4

Orszag 2/3 rule

Hi,

I have a question about dealaising a Fourier-Pseudospectral-Code for the 3D incompressible Navier-Stokes-Equation by using the Orszag 2/3-Rule.

Does the rule refer to every single...

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