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-   -   convergence problem with high viscosity (http://www.cfd-online.com/Forums/cfx/25337-convergence-problem-high-viscosity.html)

Jan February 29, 2008 05:01

convergence problem with high viscosity
 
Dear all, I am working on simulation of gear motor. It's 2D steady state simulation. I had quite good results but now, when I increase the dynamic viscosity from 0.02 to 0.8 kg/m*s there are poor convergence problem. Next info about the model: material-oil, turbulence model-komega, advection scheme-upwind, time step-1e-4, intlet-static pressure, outlet-static pressure, taken the velocity of gears... I heard that higher value of the viscosity is better for convergence. Thanks a lot for answers and sorry for my english.

Jan


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