Flow around formula car
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. |
Dear Srad,
the following reference may be useful. http://www.fisita.com/education/cong...a2010scp11.pdf which deals with car conceptual design using k-e model. Don't forget to say thanks and click 'like' if you really like it. |
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