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Vortex Shedding in low Reynold's Number 2D airfoil

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Old   February 1, 2014, 02:22
Default Vortex Shedding in low Reynold's Number 2D airfoil
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Hi

I was simulating flow on a low Reynold's Number airfoil, eppler387. I have taken the Re No. as 60000 and angle of attack 4 degrees. In these conditions vortex shedding is supposed to occur. I simulated the problem using 3 Eq turbulence model K-Kl-w keeping laminar kinetic energy 1e-6, turbulence intensity 1% and turbulence length scale 0.0008. The results were good and I got behavior that was expected. However when I change to the 4 eq model Transition SST, I didnt
get the expected vortex shedding. As I do not have a lot of background knowledge on the subject I was wondering what might be the reason of such behavior?


3 Equation Model


4 Equation Model
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Old   February 5, 2014, 05:20
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you should go through the basics books of cfd you will get your answer or also you get it in fluid dynamics books..
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2d airfoil, low reynold's number, transition, transition sst, vortex shedding

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