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Forum: CFX

April 9, 2010, 07:38

Replies: 6

Timestep study

Views: 3,940

Posted By ghorrocks

Then you timestep is too large. Try a bit smaller...

Then you timestep is too large. Try a bit smaller than that. Also you can only increase the time step dramatically once you are in the monotonically converging section. If you do it before then it...

Forum: CFX

April 7, 2010, 18:36

Replies: 6

Timestep study

Views: 3,940

Posted By ghorrocks

If you know you have transient shedding happening...

If you know you have transient shedding happening then your only choice in a steady state simulation is to use a very large physical timestep - much larger then the eddy turnover time of the...

Forum: CFX

April 4, 2010, 07:38

Replies: 6

Timestep study

Views: 3,940

Posted By ghorrocks

Have you looked at: ...

Have you looked at:

http://www.cfd-online.com/Wiki/Ansys_FAQ#My_steady_state_solution_converges_for_a_while_but_stops_converging_before_reaching_my_convergence_criteria

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