Convergence issues

February 21, 2007, 18:59

When running a turbulent case in Fluent, I am getting a message stating that the turbulent viscosity ratio limited to 1.0e+5. Does anyone know how to fix this?

February 23, 2007, 01:55

Are you usung standard-k-e? Try realizable k-e. Perhaps it gets better.

February 23, 2007, 05:16

be patient ... it needs some time to converge ... some more iterations ... try to adjust under-relaxation parameters

wabik

February 23, 2007, 14:07

What do you want to fix? Make the message go away - then change the tolerance in the set-up. If the value is unrealistically high, then you would take a different approach.

February 21, 2007, 18:59	Convergence issues	#1
Zachary Sorensen Guest Posts: n/a	When running a turbulent case in Fluent, I am getting a message stating that the turbulent viscosity ratio limited to 1.0e+5. Does anyone know how to fix this?

February 23, 2007, 01:55	Re: Convergence issues	#2
Michele Guest Posts: n/a	Are you usung standard-k-e? Try realizable k-e. Perhaps it gets better.

February 23, 2007, 05:16	Re: Convergence issues	#3
wabik Guest Posts: n/a	be patient ... it needs some time to converge ... some more iterations ... try to adjust under-relaxation parameters wabik

February 23, 2007, 14:07	Re: Convergence issues	#4
Allan Walsh Guest Posts: n/a	What do you want to fix? Make the message go away - then change the tolerance in the set-up. If the value is unrealistically high, then you would take a different approach.

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