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Old   March 16, 2012, 03:02
Default CFX residual bouncing
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wind
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Hi, i'm doing the simulation of the spray with water mist. Initally i'm using mass flow rate of 2g/s of injected water mist, the solver is steady and converge, When i increase the mass flow rate of the injected water mist to 200g/s, I'm facing the convergence issue and the residual is bouncing as shown in the attachment. May i know how can i resolve this issue? Any one can help me? Thanks.
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Old   March 16, 2012, 03:32
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i think with decreasing time scale.
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Old   March 16, 2012, 04:36
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Hi, thanks for your reply. Currently, i'm using auto time scale, should i change to physical time scale, and use small time step?
Thanks.
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Old   March 16, 2012, 05:27
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Quote:
i think with decreasing time scale.
In general this is wrong and will make it worse.

Try reading this FAQ: http://www.cfd-online.com/Wiki/Ansys...gence_criteria
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Old   March 16, 2012, 05:49
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Hi, Thanks for your reply ghorrocks. now i trying with larger physical time, see whether it work or not..
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