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Free stream edge definition

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Old   July 10, 2015, 05:06
Default Free stream edge definition
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mike
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Hello All;

I am studying flow transition over Naca0012. I have selected K-Omega model with Retheta-Gamma transition sub-model. I have also created a custom field function the same as that in help:

$WallDistance > 0.005?1:0

I have some questions about this function. Thanks a lot to any replies.

1- As I have understood, the free stream edge means boundary layer edge. Should we know the boundary layer thickness (Delta) over the airfoil before solution (where it consists of laminar -transition and turbulent regimes) ?!!!!!

2- In order to capture transition including T-S waves and separation bubble mechanisms, is the abovementioned offered function is enough or some special considerations must be taken.

Thanks a lot.
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Old   July 21, 2015, 15:42
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Matt
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What is it that you are trying to capture, exactly? Transition location, separation bubbles, and reattachemnt location?

What is the point of the field function? I understand what it's doing, but not why its relavant.
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