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#1 |
Senior Member
A. Min
Join Date: Mar 2015
Posts: 305
Rep Power: 12 ![]() |
Hi all
I simulate transient incompressible creep flow on a couple of cylinders to calculate drag force in a special period of time. The drag coeff. oscillates with time (figure) and I don't know why! Re=1, dt=0.005(Cr=0.8), SIMPLE algorithm, tolerances are set on 1e-12, URFs=0.5, 2nd order schemes are used for divergence terms and time derivative. I think it is because of Mesh, but I don't know if it is correct or not and how I should improve it. ![]() ![]() Thenks |
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#2 |
Senior Member
Peter Baskovich
Join Date: Jul 2014
Posts: 127
Rep Power: 12 ![]() |
Can you share the case or at least log file?
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#3 |
Senior Member
A. Min
Join Date: Mar 2015
Posts: 305
Rep Power: 12 ![]() |
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Tags |
creep, drag, numerical, openfoan, oscillation |
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