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Time step in time explicit solver

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Old   April 5, 2005, 13:59
Default Time step in time explicit solver
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Simon
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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
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Old   August 5, 2009, 10:32
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Shamoon Jamshed
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The dx is the minimum of cell size
cheers
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