Hi all,

I am facing a rotating mesh problem. In my case, an ellipse wall in XY-plane rotates around its center axis (Z-axis) with a sinusoidal function alpha = sin(omega*t). At initial time (t=0), the ellipse is horizontal in X-axis. I define two functions for mesh movement as follows, XDIS = r*cos(omega*t/1[s]+theta)-r*cos(theta); YDIS = r*sin(omega*t/1[s]+theta)-r*sin(theta); omega = 2*pi; Time for transient analysis is t = 1 [s]; TimeStep = 0.001 [s]. My problem can not be solved even though the mesh is very fine and the ellipse wall was set to Specified Location or Specified Displacement. I think that there must be a problem in my mesh movement functions. I still don't know how to treat them. Could you please suggest any rotating mesh function for me?

Thank you very much for your help.

Hi,

If the mesh only rotates then use a rotating frame of reference and forget about moving mesh.

Regards, Glenn Horrocks