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convergence in OpenFoam

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Old   October 24, 2016, 09:38
Default convergence in OpenFoam
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annn
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how do you know that your soltuion has converged?
because sometimes if it converged before the endTime it will say it has 'converged in x iterations' so does that mean if you reached you end time and it still hasn't said that it hasn't converged?


I am asking about this because I am running a transient simulation and after several hundred iterations I see no change when I look at the results, so to me I am guessing it has reached a steady state which means it converged, is this correct? and to mention, it has not reached the endTime yet

is this too trivial?

Last edited by cleoo; October 27, 2016 at 10:14.
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Old   July 16, 2017, 05:46
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pyFoamPlotWatcher.py may help

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Old   August 25, 2017, 05:55
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You may have to specify what kind of solver you are using. But assuming that you are using one that is designed to converge to a steadystate solution:

If it converges in x iterations before reaching the end time then it has reached what it belives is a steady state.

If it's not in a steady state yet, you may have to check if your convergence criteria are to relaxed.

If it's been in a steady state for a while but your simulaton is not stoping, the convergence criteria may be to strict.

If it reaches the end time then it could not find a convergent solution in the given time.
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