# turbulent viscosity problem

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 October 6, 2006, 07:22 turbulent viscosity problem #1 majie023 Guest   Posts: n/a Sponsored Links In my caculation,it apprears the following information again and again:turbulent viscosity limited to viscosity ratio of 1.000000e+005 in 262718 cells. And certainly it can't reach convergence even after 600 iterations.What's going wrong with it?

 October 6, 2006, 15:40 Re: turbulent viscosity problem #2 Neelima Guest   Posts: n/a Hello, I would recommend you to check whether you have scaled the grid properly when you first read the mesh into Fluent Solver. Neelima

 October 6, 2006, 20:12 Re: turbulent viscosity problem #3 majie023 Guest   Posts: n/a Thanks for your help. I am sure I have scaled the grid properly,but the problem still exits.I don't know what to do next.

 October 6, 2006, 20:27 Re: turbulent viscosity problem #4 zxaar Guest   Posts: n/a initiate the calculation with very low value to k, (default init is 0.1), I usually use 0.0001. In most cases this would solve the problem.

 October 7, 2006, 05:07 Re: turbulent viscosity problem #5 sam Guest   Posts: n/a as i guess this is problem due to ill posed boundary condition. are u sure abt ur BC?

 October 9, 2006, 03:35 Re: turbulent viscosity problem #6 sach Guest   Posts: n/a check the following 1) this comes mailny due to mesh quality issue (skewness and aspect ratio) 2) it may go off after few thousand iteration 3) let me know for any quary sachcool80@gmail.com

 October 11, 2006, 21:40 Re: turbulent viscosity problem #7 mahendran.n Guest   Posts: n/a hello , increase the limit values in the solve menu ... this will solve the problem .. i used to do this when such a situation comes mahendran

 October 11, 2006, 21:42 Re: turbulent viscosity problem #8 mahendran.n Guest   Posts: n/a increase the limit values in the solve - controls - limits ... this will solve the problem .. i used to do this when such a situation comes mahendran

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