[cinclus]

hello everyone,

I am simulating the oscillation of a flap in laminar flow.
Time step is 0.01 and I have 20 iterations per time step.
Solution looks compliant with theory (sinusoidal oscillation of cl, cd and cm with cd frequency double cm and cl one)

Once I play the animation though I can see the velocity magnitude in the far field changes abruptly from time step to time step (not every single time step but few times in the whole simulation).

Do you have any idea where this issue originates from?

Mesh looks good and pressure animation doesn't show any visible issue.

Thanks in advance.