Downforce Underbody Diffusor -- CFD Online Discussion Forums

January 10, 2012, 16:02	Downforce Underbody Diffusor	#1
Cola1988 New Member Philipp Bolay Join Date: Jan 2012 Posts: 6 Rep Power: 14	Hello Everybody, I'm from a Formula Student Team and i'm simulation the aerodynamic concepts. At the time i'm simulating the underbody diffusor. My problem is I can't display the downforce in Y-direction... It normally brings totaly unnormal values of about 50000N.... My Expression says: force_y()@underbody underbody is the bottom surface ( I selected it as a separate part in ICEM) of the underbody... Do i have to select gravity or somthing other? Am i doing it wrong the hole way? http://www.bilder-hochladen.net/file...xs-2c-9778.jpg http://www.bilder-hochladen.net/file...hxs-2d-fe9f.jp http://www.bilder-hochladen.net/file...xs-2e-68d3.jpg Thanks and regards Phil

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