TAGGED: divergence, fluent, non-initial-divergence
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March 16, 2022 at 12:35 pmALEXANDRE COSTASubscriber
Hi All,
I am having divergence issue after 0.3 s (around 30000 iterations) for a transient run in Fluent:
March 16, 2022 at 1:54 pmRobForum ModeratorThat's been struggling for the last several time steps. Assuming you have the data file saved have a look at what's going on. I suspect something is changing more quickly than the time step can resolve, so it's probable that you'll want to reduce the time step. For P-V coupling you may find PISO to be more efficient, the PBCS doesn't give much (if any) benefit on a transient run.
October 24, 2023 at 10:58 pmAkshat JainSubscriberOctober 25, 2023 at 8:57 amRobForum ModeratorTurn off the UDF and see what happens - when models fail always switch off models until it works, then work out which model(s) cause the problem.Â
October 27, 2023 at 10:04 pmAkshat JainSubscriberIt works when i input a constant value for heat flux. I import my data from a txt file (using the read-transient-table function), i don't know how to diagnose what is wrong with that process
October 27, 2023 at 10:27 pmOctober 31, 2023 at 2:08 pmRobForum ModeratorAh, you want to use a transient profile and not have repeat values in the time column - use an extra decimal place when you alter the formatting to suit a profile.Â
Viewing 6 reply threads- The topic ‘Avoiding divergence in a transient run Fluent’ is closed to new replies.
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