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Old   July 1, 2009, 22:52
Question Drag calculation!
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Mominul MuKuT
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I have tried to calculate drag using von karman's method, the principle of momentum. I have collected the wind tunnel outlet velocity from phoenics. but the main problem is nothing but the shape of velocity profile of a regular car shape on wind tunnel.

My experimented model car in phoenics virtual domain is 3mX2mX1.5m. The the virtual domain is 20mX5mX5m

wind tunnel.JPG

The car is on the tunnel i.e. car wheel touch on the base of tunnel, air is flowing from the inlet uniformly. But I can't fix perfectly the velocity profile for the car, that's why the von karman's momentum eqn can't be applied perfectly..........can anyone help me?

Last edited by mukut; July 1, 2009 at 22:58. Reason: pic correction!
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boundary layer, drag, velocity profile

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