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Forum: CFX

July 14, 2016, 05:51

Replies: 6

Accuracy Problem with Flow over 2D cylinder at Transcritical Reynolds Number

Views: 2,535

Posted By ghorrocks

There is a general FAQ on accuracy. Have you read...

There is a general FAQ on accuracy. Have you read it? http://www.cfd-online.com/Wiki/Ansys_FAQ#Why_are_my_results_inaccurate.3F

Forum: CFX

February 26, 2014, 16:56

Replies: 6

Accuracy Problem with Flow over 2D cylinder at Transcritical Reynolds Number

Views: 2,535

Posted By ghorrocks

* Use adaptive time stepping, or at least do a...

* Use adaptive time stepping, or at least do a time step sensitivity check on the time step you are using.
* Check that the inlet turbulence you have specified is not diffusing the vorticies. Try...

Forum: CFX

February 25, 2014, 17:27

Replies: 6

Accuracy Problem with Flow over 2D cylinder at Transcritical Reynolds Number

Views: 2,535

Posted By ghorrocks

I would do a time step size and convergence...

I would do a time step size and convergence tolerance sensitivity check, but if you say you are converging to 4 coeff loops per iteration then your current time step looks pretty good.

There is an...

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