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Originally Posted by ayau
What are you using for your model? Is it a computer generated model or a physical model?
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It is a computer surface model
Quote:
Originally Posted by serialk11r
Thanks for doing the testing. Your C_d is lower than the manufacturer claim most likely because you essentially have a sealed front grill (radiator causes drag), smooth bottom, and non rotating wheels.
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We are aware of the problems with using the model, but there's still a very strong correlation with the real world values given by Toyota and Subaru. Even though it isn't an exact model, it gives us repeatable, accurate data.
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Originally Posted by Shankenstein
Agreed. We have an opportunity to keep this forum untainted and really make something special happen.
EarlQ, the world is a better place because of your work. If you'd be willing to distribute your solid model, I (and others) would be glad to improve it and run a heap of simulations. I'm a MechE that primarily works with Pro/E, and so-so with SolidWorks and Inventor. Minimal CFD, but some magnetic and stress FEA work. If it's validation, we can do that... but I imagine the primary benefit will be identifying "hot spots" and testing solutions for both Eco and Track purposes. Alot of smart folks on here with similar interests.
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Unfortunately, I cannot give you our final model because we have done some proprietary work to it. However, this BRZ model can be purchased and is an excellent base
http://humster3d.com/2011/12/15/subaru-brz-2013/ You will need to "seal" the surfaces to make the model watertight when doing CFD. We use OpenFOAM, which is open source and free to the public. You do however, the Linux to run it. If anyone were to try and do their own CFD analysis, we could help you get started.