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Stable LowRE model

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Old   March 8, 2012, 15:00
Default Stable LowRE model
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Mio S
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I'm having difficulty obtaining a cleanly converged solution when for lowRe simulation. I've tried Standard k-e lowRe, AKN-k-e, and both of them produce answers that are quite oscillatory for all iteration counts. For the range of Re = 1e4-1e5, what are the reasonable turbulence models people use?

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Old   March 10, 2012, 03:46
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Usually oscillations are no issue but physical behaviour. There are just a few really steady flows, you can nearly count them with the fingers of your hands. Most physical problems are unsteady, especially for higher Reynolds numbers.
So I assume, your chosen turbulence model is fine and the oscillations are just because the sovler tries to solve the physics.
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low reynolds, turbulence model

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