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stopping CFX solution run at best results

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Old   October 3, 2012, 10:08
Lightbulb stopping CFX solution run at best results
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Mahmoud Gabr
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My question is, how can I stop CFX solution run at best results although it stopped at a result due to max. number of loops reached.

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M.Gabr
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Old   October 3, 2012, 10:24
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ali
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the best result is when your residual curves are like a flat line.
this means that your solution is converged properly.
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Old   October 3, 2012, 11:22
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Mahmoud Gabr
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i mean that if RMS curves are like sin wave and solution stopped at it's peak due to reaching max. number of loops . could i select at which accumulated time step should it stop after run finished ?????

thanks
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Old   October 3, 2012, 15:51
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Erik
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I don't know why you would want to do this, If your residuals are oscillating there is probably a transient part of the fluid flow, (vortex shedding) In this case the iteration with lower residuals is no more correct than the one with higher residuals. If you still want to do this though....you can write results files every so often, this is done in CFX-PRE under "output controls"
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Old   October 4, 2012, 07:40
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This question looks like an FAQ to me: http://www.cfd-online.com/Wiki/Ansys...gence_criteria
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