convergence problem with high viscosity -- CFD Online Discussion Forums

February 29, 2008, 04:01	convergence problem with high viscosity	#1
Jan Guest Posts: n/a	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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