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April 10, 2021, 06:01
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CFX Convergence Problem-Steady State
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#1 |
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New Member
ANGELO
Join Date: Jul 2020
Posts: 12
Rep Power: 5  |
Hi,
I am simulating a cylinder(D=0.2m, L=0.8m) rotating at 34 rad/s immersed in a cylindrical volume of Air(D=1m, L=1m). The cylinder has two plates on both sides to simulate the effect of endplates and the cylinder is only rotating. I have a value of y+ =2.5 and a good quality of mesh=0.7. The problem is that the solution is not converging even if I keep it running for 12 hours, it keeps oscillating arround 1.5*10-4(I am using steady state). The aim of the simulation is to determine the torque on the cylinder wall and then the friction coefficient Cf. Before simulating the cylinder with the endplates the solution converged and everything worked good. Can anyone help me please regarding the convergence problem. Enclosed the geometry image and the residual screenshot. Thanks, Angelo |
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April 10, 2021, 06:59
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#2 |
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Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,703
Rep Power: 143 |
__________________
Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum. |
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| Tags |
| cfx, convergence problems, steady state |
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