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June 8, 2019, 05:00 |
Stability with Under Relaxation factor
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#1 |
Senior Member
Arijit Saha
Join Date: Feb 2019
Location: Singapore
Posts: 132
Rep Power: 7 |
I was conducting a simulation of two airfoil and the residual monitor at the beginning was showing oscillating behavior. Then I reduced the URF and Explicit relaxation factor too and with successive trial method the residuals got damped. I was doing with k epsilon model and kept the tolerance to be 0.001 for k and epsilon and for x,y velocity and continuity kept 1*10^-6.
All the residuals converged except epsilon. Now my question is which URF value should I change so that the epsilon converge? And when should I change the explicit residual value? Note- In a separate monitor the Cl value is almost horizontal irrespective of the non-convergence of the epsilon value. Will be really helpful if someone replies. |
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