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August 30, 2012, 21:12 |
convergence problem
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#1 |
Senior Member
navid
Join Date: Jan 2010
Posts: 110
Rep Power: 16 |
Hi all,
I have problems in getting convergence for an unsteady simulation. the continuity residuals do not fall down below 4*10^-3. changing URF's does not make a difference. what surface monitors can I use to check convergence? since there is no steady state solution for my problem, every quantity like pressure and velocity will change in domain. how can I deduce convergence from surface monitors? Below is the picture of the residuals. any ideas? |
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August 31, 2012, 16:48 |
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#2 |
New Member
Jared Brewer
Join Date: Dec 2009
Location: New Orleans, La
Posts: 7
Rep Power: 16 |
It is going to depend on your simulation. Typically, I monitor mass/volume flow rates across boundaries. Unsteady simulations are usually a little more difficult to judge convergence based on residuals.
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September 1, 2012, 04:07 |
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#3 |
Senior Member
navid
Join Date: Jan 2010
Posts: 110
Rep Power: 16 |
I don't have any mass flow rate. my problem is a bubble collapse simulation. I cannot check pressure or velocity in domain since it is changing constantly. I don't now if my simulation is converged or not?
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