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3D flow separation on buildings

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Old   March 13, 2013, 11:42
Default 3D flow separation on buildings
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Hi everybody,
I've to evaluate if there is flow separation and eventual reattachment points on the roof of a building , which is sourronded by a huge parallelepiped of air (to simulate wind driven natural ventilation in buildings). How could I do?I've read about the plot of wall shear stress in 2D problem, but in my 3D case what is the better way?
Thanks a lot for any suggestion
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