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Forum: Main CFD Forum

March 10, 2015, 14:40

Replies: 6

successful time step for 2D problem failing for 3D case of same problem.

Views: 1,381

Posted By adrin

Then you most likely (definitely?) have a bug in...

Then you most likely (definitely?) have a bug in the code! What are the 2- and 3-D problems you were solving and what are the corresponding CFL values?

adrin

Forum: Main CFD Forum

March 9, 2015, 21:32

Replies: 6

successful time step for 2D problem failing for 3D case of same problem.

Views: 1,381

Posted By adrin

Though it is true that the stability constraint...

Though it is true that the stability constraint for 3D is stricter than in 2D, it is difficult to believe that the time step size would have to drop by 4 _orders_. By 4 _orders_ I understand you're...

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