Search Results

Showing results 1 to 5 of 5
Search took 0.00 seconds. Search: Posts Made By: stevenvanharen

Forum: OpenFOAM Running, Solving & CFD

January 28, 2011, 02:56

Replies: 41

DNS with openfoam

Views: 22,203

Posted By stevenvanharen

This is one of my spectra for a DNS of a channel...

This is one of my spectra for a DNS of a channel flow at Re_tau = 180.
Spectra extracted over the plane in the center of the channel.

As you can see my mesh is 128 cells in streamwise direction...

Forum: OpenFOAM Running, Solving & CFD

January 28, 2011, 02:48

Replies: 41

DNS with openfoam

Views: 22,203

Posted By stevenvanharen

midPoint will be exactly the same as linear if...

midPoint will be exactly the same as linear if you use cells without stretching

blended will indeed introduce diffusion

I use sometimes either of these for DNS but that is on unstructured grids...

Forum: OpenFOAM Running, Solving & CFD

January 27, 2011, 15:58

Replies: 41

DNS with openfoam

Views: 22,203

Posted By stevenvanharen

Just change: div(phi,U) Gauss linear; ...

Just change:

div(phi,U) Gauss linear;

into (for midPoint):

div(phi,U) Gauss midPoint;

or (for 5 percent upwind):

Forum: OpenFOAM Running, Solving & CFD

January 27, 2011, 15:31

Replies: 41

DNS with openfoam

Views: 22,203

Posted By stevenvanharen

ok, Did you use nyquist's criterion to...

ok,

Did you use nyquist's criterion to determine the highest wavelength that you can represent on your mesh? How many cells do you have in the direction you took the spectrum?

If your answer...

Forum: OpenFOAM Running, Solving & CFD

January 27, 2011, 09:53

Replies: 41

DNS with openfoam

Views: 22,203

Posted By stevenvanharen

Hi Aldo, Is this spectrum in space or time? ...

Hi Aldo,

Is this spectrum in space or time?

And what discretization do u use for the convective term?

Regards,

Steven

Showing results 1 to 5 of 5

Forum Jump

All times are GMT -4. The time now is 08:01.