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Ansys Learning Forum Forums Discuss Simulation Fluids Setting the Courant Number Reply To: Setting the Courant Number

Rob
Forum Moderator

I tend to estimate a likely highest speed, work out how long that takes to cross a cell and divide that number by 10. That's my starting time step. I then adjust (carefully) from there. It's  fairly rough rule of thumb we've been using for over two decades and usually works. 

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