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Forum: Main CFD Forum

January 11, 2012, 18:36

Replies: 13

why lift coefficients don't converge at high angle of attacks?

Views: 6,706

Posted By cfdnewbie

Well, if the flow separates periodically or...

Well, if the flow separates periodically or periodic vortices form, then of course your lift and drag would show the same behaviour.... so maybe I am misunderstanding your...

Forum: Main CFD Forum

January 11, 2012, 16:44

Replies: 13

why lift coefficients don't converge at high angle of attacks?

Views: 6,706

Posted By cfdnewbie

Adding to the points mentioned by Martin:...

Adding to the points mentioned by Martin: Explicit or implicit time stepping? if you are doing RANS, I'd guess implicit....if so, check your CFL, maybe your steady solver actually starts to pick up...

Forum: Main CFD Forum

January 11, 2012, 12:52

Replies: 13

why lift coefficients don't converge at high angle of attacks?

Views: 6,706

Posted By cfdnewbie

Hi, I'm no expert on steady calculations, but I...

Hi,
I'm no expert on steady calculations, but I would guess that with increasing AOA, your problem becomes ever more "transient", since (in reality) you would see serious vortices rolling up from...

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