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Time step in time explicit solver

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April 5, 2005, 14:59	Time step in time explicit solver	#1
Simon Guest Posts: n/a	I know that Fluent chooses the time step (in an unsteady explicit model) as: CFL Dx /(u+a). But what is exactly Dx? The help says it is the local grid size. What does it mean? Consider that I have a quadrilateral 2D mesh, is it the diagonal? the biggest dimension? To anyone that can help me...Thank you

August 5, 2009, 11:32		#2
Shamoon Jamshed Senior Member Shamoon Jamshed Join Date: Apr 2009 Location: Karachi Posts: 381 Rep Power: 18	The dx is the minimum of cell size cheers

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