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Old   November 14, 2023, 04:10
Default Physical Model
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Hi!

I'm doing a conjugate heat transfer analysis och my fluid temperature will vary, so for different cases my Reynolds number will vary from around 1000 to 6000 (pipeflow). What model would you use? I have now used the k-omega SST, but since in some cases the flow will be more laminar, I am not sure if this is the right approach.

As I understand it, it is not a good idea to switch model in between cases, for example if i would use the laminar model for R<2300 and the k-omega for everything above. My pipe has a smooth bend , but my region of interest is after the entry length after this bend. I have also added roughness inside my pipe to get the right pressure drop for the k-omega model.

Any insight on how to think here?
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Old   November 14, 2023, 04:13
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Also, I have looked into the transition sst model, but it is more suiteble for aerodynamics and not so much for pipeflow if i understand it correctly?
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laminar flow, model equation, transitional, turbulance


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