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Seperation using Wall Function

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Old   August 28, 2018, 03:55
Post Seperation using Wall Function
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Amit Joshi
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Can the separated flow computation be done using Wall Function? What approach should be followed? Please help!!

As I read in Wilcox that there is no evidence that the law of wall holds in the separated region and hence its use via wall function is a questionable approximation.
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Old   August 28, 2018, 07:32
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Depends from the wall function and the kind of separation.

Some formulations take into account some terms that are considered relevant in predicting certain separated flows.

But the classical law of the wall certainly doesn't fit a separated flow correctly.

Yet, in practical terms, you can still gain something in certain corner cases.

In general, the answer is NO, wall functions can't be used for separated flows.
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Old   August 29, 2018, 15:32
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Quote:
Originally Posted by sbaffini View Post
Depends from the wall function and the kind of separation.

Some formulations take into account some terms that are considered relevant in predicting certain separated flows.

But the classical law of the wall certainly doesn't fit a separated flow correctly.

Yet, in practical terms, you can still gain something in certain corner cases.

In general, the answer is NO, wall functions can't be used for separated flows.
Thanks for clearing it.
Is it suggestible to carry on this topic as my master's thesis? I am not sure that I will get any progress within 8-10 month of the span.
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boundary layer, seperated flow, turbulence analysis, wall functions, wall funtion

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