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Force coefficient oscillations for small timestep |
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November 8, 2013, 13:53
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Force coefficient oscillations for small timestep
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Senior Member
Francisco
Join Date: Mar 2012
Location: Spain
Posts: 273
Rep Power: 15  |
Hi everybody,
I'm working with a 3D moving mesh and I've noticed a behaviour in the force coefficients of which I don't know the reason. The thing is using a time step of 1e-4 s the force coefficients have an oscillating component even though they follow a correct sinusoidal behaviour. But when I rise the time step to 1e-3 this oscillations disappear. Why is this happening? You can view this two behaviours in the picture, before 0.46 s time step is 1e-4 and after this moment it's 1e-3. |
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| force coefficients, oscillations, time step |
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