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August 14, 2012, 05:12 |
Already converged?
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#1 |
New Member
Join Date: Aug 2012
Posts: 2
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Hi!
I am new to Ansys/CFD and have some questions about my convergence plot shown below. For the beginning an ideal gas in a pipe was simulated with following parameters: Pipe: length: 7cm diameter: 0.1 cm fluid: Inlet speed: 125m/s relative pressure outlet: 0 Pa mesh: elements: 15975 nodes: 17568 Is my result already "okay"? Do I have to improve any settings, for example mesh, to obatin better results? Are more iterations steps necessary? I know, that the pipe is too short to reach a fully developed flow profile. Does this affect my convergence? Thanks in advace, Julien |
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August 14, 2012, 07:43 |
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#2 | ||
Member
Max
Join Date: May 2011
Location: old europe
Posts: 88
Rep Power: 14 |
Quote:
Quote:
But this is only a guess... I do not have much experience with turbulent flows. So you better wait for someone who is qulified to confirm this =) |
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August 14, 2012, 07:49 |
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#3 | |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,703
Rep Power: 143 |
Quote:
This FAQ describes some issues which cause CFD errors: http://www.cfd-online.com/Wiki/Ansys..._inaccurate.3F the following FAQ has a link to a very useful piece on CFD accuracy. |
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August 14, 2012, 13:18 |
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#4 |
Senior Member
Stuart
Join Date: Jul 2009
Location: Portsmouth, England
Posts: 733
Rep Power: 25 |
Just to add to that above. You should also check the various imbalance percentages at the end of the out file.
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