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?
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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