|December 9, 2011, 02:28||
Flow around formula car
Join Date: Dec 2011
Posts: 3Rep Power: 7
Im now analizing flow around formula car, especially on under the vehicle often called floor, undertray or underbody.
I got a result showing negative force（downforce）on floor and as a hole vehicle.
But the analisys was done with k-ε.
Turned on k-ω, then I got positive force as hole vehicle, almost 0 force on floor.
I can under stand flow separation occurs stronger on k-ε, then downforce will be decreased.
One model with k-ε shows similar downforce to experimantal data, but when with k-ω, shows lift force!
Another with k-ε shows too much excessive downforce, but with k-ω, shows similar to experimantal data.
All the surface under the body is meshed as prism layer, and others are tetra.
Is this a problem?
Or are there other problems?
I can't resolve this problem for a long time!
Please help me. Please.
|December 10, 2011, 03:57||
Join Date: Nov 2011
Posts: 11Rep Power: 7
the following reference may be useful.
which deals with car conceptual design using k-e model.
Don't forget to say thanks and click 'like' if you really like it.
|k-ε, k-ω, prism, vehicle|
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