|February 26, 2011, 05:00||
UDF for moving mesh
Join Date: Feb 2011
Posts: 4Rep Power: 7
am trying to write UDF in fluent for my rotor motion in the stator. I tried a lot but i cant can someone help me.....
Rotor having the both translation and rotational motion in stator.
the translation motion is in eccentric motion.
The diameter of rotor is 39.878mm
My rotor center linear motion is controlled by equation: x=2*e*sin(theta)
Angle of rotor rotation =theta
Angular motion of rotor=Nr=60 rpm.
Angular velocity of rotor=w=2*Nr*pi/60 rad/s
Initially the rotor center (0,0) is same as stator center (0,0). I consider first plane of rotor (or stator) as the initial plane. As we move from one end (or initial plane) along z-direction, stator center lies on z-axis. But the rotor center moves eccentrically inside stator. [Stator is twisted and having its axis on z-axis].
Rotor pitch (Pr) =1/2*stator pitch (Ps) or Pr=Ps/2
Assume, Time step=dt
One rotor revolution takes 1/w seconds.
Number of steps for a single revolution, N = (1/w)/dt
After time dt, the rotor center will be at x1=2e*sin(w*dt)
x1 is distance from the center (0,0).
In this link u can see the motion of rotor
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