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time taken to update solution in unsteady flow

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Old   May 6, 2004, 04:50
Default time taken to update solution in unsteady flow
  #1
phil
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Hi, I am running an unsteady simulation, the interations are running at a acceptable rate however it takes a very long time to update the solution. Is there anything i need to do to speed this up? is it possible i may be trying to update a solution over the network? what is the file that fluent is updating?
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Old   May 6, 2004, 12:03
Default Re: time taken to update solution in unsteady flow
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co2
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Dear phil:

are you writing a lot of .out files ? monitors ?

if so, if you are doing it per iteration, that might be the culprit -- just a wild guess.
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Old   May 6, 2004, 12:05
Default Re: time taken to update solution in unsteady flow
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phil
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thanks for the reply but unfortunately its definately not that, i have no monitors of any time and the iterations are progressing well it just takes a lot of time to update the solution at the end of every timestep
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Old   May 7, 2004, 08:22
Default Re: time taken to update solution in unsteady flow
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co2
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are you writing to network drive or local drive? try local - that may give you better results.
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Old   May 17, 2004, 07:33
Default Re: time taken to update solution in unsteady flow
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kethireddy
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Hi best thing to improve the convergence rat is just increase underrelaxation factors(ideally to 1) .. kethireddy... rwth-aachen.. Germany
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Old   May 17, 2004, 10:08
Default Re: time taken to update solution in unsteady flow
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ozgur
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Are you using VOF model? If so, that should be the reason of long updating time because of the VOF sub-time steps.
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Old   May 17, 2004, 10:12
Default Re: time taken to update solution in unsteady flow
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Phil
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yes it is VOF
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