|December 9, 2011, 02:28||
Flow around formula car
Join Date: Dec 2011
Posts: 3Rep Power: 5
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: 5
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|
|Thread||Thread Starter||Forum||Replies||Last Post|
|mass flow in is not equal to mass flow out||saii||CFX||2||September 18, 2009 09:07|
|3D Supersonic flow over a car||TeQuiero_Q8||FLUENT||0||August 13, 2009 04:42|
|transform navier-stokes eq. to euler-eq.||pxyz||Main CFD Forum||37||July 7, 2006 09:42|
|Flow field analysis around the car||Cenk||FLUENT||1||December 26, 2003 19:09|
|Simulation of Car Cabin Air Flow||Erwin Susanto||Main CFD Forum||0||May 19, 2000 12:33|