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3D turbulent couette flow
Posted 18 mars 2012, 11:18 UTC−4 Fluid & Heat 1 Reply
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hello everybody, I am trying to simulate 3D coutte flow under laminar and turbulent conditions . The upper plate moves with 0.049 m/s in laminar and 0.49 m/s for turbulent and the same but negative velocity direction for the lower plate.
For the laminar case I got the correct velocity profile for u (velocity component in x- direction).In the turbulent case, the velocity distrbution looks like ok but the values of the u doesn't look correct to me. At y=0(lower plate position ) and y=5mm (upper plate position) I was expecting velocity values of 0.49 m/s (Boundry condition of moving plate are +- 0.49 m/s) but the results showed only u with 50% of this input velocity value. I tried to solve with different mesh size but always I got the same velocty vlaues.
Any one could explain why is that ?
For the laminar case I got the correct velocity profile for u (velocity component in x- direction).In the turbulent case, the velocity distrbution looks like ok but the values of the u doesn't look correct to me. At y=0(lower plate position ) and y=5mm (upper plate position) I was expecting velocity values of 0.49 m/s (Boundry condition of moving plate are +- 0.49 m/s) but the results showed only u with 50% of this input velocity value. I tried to solve with different mesh size but always I got the same velocty vlaues.
Any one could explain why is that ?
1 Reply Last Post 19 mars 2012, 03:30 UTC−4
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Posted:
1 decade ago
If you can post ur file, then the problem can be better understood, as sometimes it might be due to the definitions and boundary conditions