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-   -   How to calculate initial omega for k_omega_SST (http://www.cfd-online.com/Forums/openfoam-solving/114961-how-calculate-initial-omega-k_omega_sst.html)

HaZe March 20, 2013 14:59

How to calculate initial omega for k_omega_SST
 
Hi Foamers,

I'm having problems with my OF Simulation. My case is a internal combustion engine and I'm simulating the gas exchange without combustion. It's probably the turbulence model (k-epsilon) and therefor I'd like to run the simulation again with k-omega-SST. My problem now is how to calculate the initial values for omega in the internal and boundary field. I already searched the forum and had a look into the tutorials. In the cases I had a look at the initial omega varied in a huge range between 4.5e-3 and 77200.

Is there a broad rule how to choose the initial omega?

Regards,
HaZe

haakon March 20, 2013 15:50

Have you tried the "Turbulence properties" calculator here at cfd-online.com? You find it under the "Tools" menu at the top.

http://www.cfd-online.com/Tools/turbulence.php


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