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initial condition for k and epsilon for frozen rotor case.

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Old   June 6, 2014, 12:19
Default initial condition for k and epsilon for frozen rotor case.
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Hi all,

I'm trying to simulate a fan inside channel, using MRF source terms and simpleFoam.

I'm looking for help how to calculate values of k and epsilon for a wall bounded flow of such type of case.

I look into literature, but I was able to find correlation only for free-stream flows, or bounded flows with constant section.

One thing I have doubt is: in my case, I have many sections for each channel, and I don't have a free stream velocity as it changes according to section's change.

How can I set proper initial condition for k and epsilon?

I'm a bit confused and I would like to have a little help to clarify myself.

Thanks a lot.
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Old   June 12, 2014, 05:38
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Im not sure if my answer is what you are looking for. I think i would first calculate the values with the "ordinary" formula for k and epsilon:
You can try to change I_U (turbulence intensity). Im sure there is a description in the wiki here as well.


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