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karman-vortex hitting airfoil. solver-question.

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Old   May 15, 2015, 11:20
Default karman-vortex hitting airfoil. solver-question.
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Hi everybody!

Im trying to modell to following case:




a cylinder creates a karman-vortex, which hits a naca 0012-airfoil and creates turbulences.

right now im trying pimpleFoam with the k-epsilon-modell. But i really would like to know if there are any better ways to realize this case. simplefoam? k-omega? i guess the biggest problem ist creating a laminar and turbulent flow in one case.

i think i've got enough cells. maybe i need some more experience and advices when it comes to set the correct boundary-conditions. however, my simulation runs and im waiting for the vortex, but my notebook doesn't has the performance for fast results.

it's actually calculating 10 hours for 1 second. :-D
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Old   May 18, 2015, 11:12
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Nima Samkhaniani
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looking for steady state condition, so i suggest using simpleFoam.
Also run the case in laminar, after the convergence is met, turn on turbulence
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Old   May 19, 2015, 06:19
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Paulo Vatavuk
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Hi,
I think you won't get a von Karman vortrex street using a steady state solver. PimpleFoam seems to be the best transient solver available in OpenFOAM. I suggest that you search in the forum for ways to tune up the solver to get a better performance.
Best regards,
Paulo
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