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Initialization for Thermally Driven Cavity using Turbulence model like k-kL

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Old   October 2, 2018, 11:08
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Ashutosh Kumar
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I am trying to simulate thermally driven square cavity with turbulence model k-kL to study natural convection. But i am not sure about the initialization as here velocity is zero initially. Please help me?

Last edited by wyldckat; October 7, 2018 at 09:29. Reason: merged posts a few minutes apart
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Old   October 7, 2018, 09:31
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Quick answer: With most turbulence models, you should at least initialize the turbulence fields with very small values, even if the velocity is zero initially.

At the very least, there is always the explanation that turbulence always exists, it's just we can't measure it or we can ignore it, because it exists at the molecular scale...
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Old   October 8, 2018, 06:26
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Thanks. I will try to simulate by assuming small values at initialization. Let's see if i'm able to get the correct result.
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cavity problem, natural convection, turbule model

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