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saeedabedi April 8, 2013 10:44

RMS fluctuation
 
Hi all

I am attempting to simulate flow over a submnarine at a constant speed.

I am using ANSYS CFX, k omega or SST turbulence model, A structured mesh with icem.

When I have coarse mesh it solves and RMS residual converges however when I have fne mesh RMS residual will not converge and there is fluctuation in RMS.


Can anyone offer some advice from previous expeience?



Cheers,

Saeed

ghorrocks April 8, 2013 18:22

Here's plenty of advice: http://www.cfd-online.com/Wiki/Ansys...gence_criteria

Your comments agree with the expected behaviour described in this FAQ.


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