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-   -   Time step in time explicit solver (http://www.cfd-online.com/Forums/fluent/36280-time-step-time-explicit-solver.html)

Simon April 5, 2005 13:59

Time step in time explicit solver
 
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

Shamoon Jamshed August 5, 2009 10:32

The dx is the minimum of cell size
cheers


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