aerodynamic analysis -- CFD Online Discussion Forums

April 5, 2005, 03:45	aerodynamic analysis	#1
wilson Guest Posts: n/a	Hi guys I am doing aerodynamic analysis of a small size car. Now I have put the car model in a rectangular box for simulation just like a wind tunnel testing experiment. But I am still uncertain about the distance between the wall of the tunnel and the car that should be kept in order to obtain no boundary effect of the wall. I read the documentation in which it is said to keep good distance between the wall and the car but nothing specific is mentioned. The wall boundary condition that I am setting is "free slip". if anyone can tell me a numerical ratio or a thumb rule for this problem. regards wilson

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