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validating turbulence model on flow around a car

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Old   February 20, 2008, 13:36
Default validating turbulence model on flow around a car
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Pedro
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Hey

I need assistance as I must validate the turbulence model Im using for the flow around a car. As for now I made all the simulations with the SST, and I have made the comparison by making these again but with the K epsilon model.

I took notes of the aerodynamic coefficients Cd, Cl, and velocity profiles in several streamlines around the vehicle. I compare them against each other and see no big difference but I believe this is not enough for succesful SST validation; they must be compared to another model of known solution. I read in the archives about the ahmed model but I fail to understand the way you use it to validate your own car.

APART from experimental data comparisons, how do you validate the turb model?

Thanks!
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Old   February 20, 2008, 17:32
Default Re: validating turbulence model on flow around a c
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Glenn Horrocks
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Hi,

As you mention, there is plenty of good data in the literature on the Ahmed body. This body is specifically designed to be car-like, so if your model does the Ahmed body well it should do most car shapes well.

Regards, Glenn Horrocks
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