TKE and Recirculation areas

decenu · May 18, 2024, 10:47

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.

decenu · May 18, 2024, 10:55

Attached photo in this reply.

May 18, 2024, 10:47	TKE and Recirculation areas	#1
decenu New Member Robert Join Date: Nov 2022 Posts: 14 Rep Power: 3	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.