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Please help about car body aerodynamic analysis

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Old   November 29, 2004, 08:46
Default Please help about car body aerodynamic analysis
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Tayfun Toraman
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I am mechanical engineering student and I need help about aerodynamic analysis of our solar car project on Fluent5. We have designed the body shape on IDEAS and we have exported it in IGES cad file format. I applied "GAMBIT 1.2.2 tutorial5: Sedan geometry meshing" instructions and now I dont know what to do. I have troubled with the dimensions of the model and boundry conditions on gambit. Our model is 5x1.8 meters and how to define a realistic boundry condition on gambit? Is it right to make a pressure inlet and pressure outlet to be able to claculate on Fluent5 the lift forces and pressure diffusion on the surface of the car body?

Best regards..
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Old   November 29, 2004, 11:14
Default Re: Please help about car body aerodynamic analysi
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Aravind
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Hi,

You can use an velocity inlet BC at the front and a pressure outlet at the rear of the car. This should work fine. If you were able to mesh the geometry then it should not be a problem, by the way is it 2D or 3D?

Aravind

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Old   November 30, 2004, 09:52
Default Re: Please help about car body aerodynamic analysi
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Tayfun Toraman
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Hi Aravind,

Our solar car body' geometry is a 3D cad model. So I can't imagine how must be the velocity inlet, the pressure inlet values for a consideration that the car's velocity is 90 km/h for exemple? In the gambit model, I make the car body stationary and there is the air flow which must be defined with BC.

Thanks...
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