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TKE and Recirculation areas

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Old   May 18, 2024, 10:47
Question TKE and Recirculation areas
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Robert
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Hello, I am analyzing the flow features of some CFD simulations for pin-fin flows. I am interested in the effects of the re-circulation zones and the turbulent kinetic energy associated.





Looking at the attached image, I can see that the higher TKE zones (in red) are immediately downstream of the trailing re-circulation zones.

Does anyone have a good explanation for this? My guess it that the breakdown of larger vortices into smaller scales generates a broad spectrum of turbulent eddies, each containing kinetic energy. But if this is the case, shouldn't this TKE be reflected in the trailing wake as well?

Info about simulation: SU2, RANS solver, Steady-state, k-omega turb model.
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Old   May 18, 2024, 10:55
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cfd, circulation, wake dynamics, wake effect

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