|
[Sponsors] |
February 26, 2011, 04:00 |
UDF for moving mesh
|
#1 |
New Member
Karthikeshwaran Ramasany
Join Date: Feb 2011
Location: chennai
Posts: 4
Rep Power: 15 |
hai,
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 eccentricity-4.039mm The diameter of rotor is 39.878mm stator dia-40.428 My rotor center linear motion is controlled by equation: x=2*e*sin(theta) Where, eccentricity=e=4.078mm Angle of rotor rotation =theta Theta=w*t 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. Time step=dt 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). http://www.youtube.com/watch?v=12Wszv1wUMk In this link u can see the motion of rotor |
|
February 26, 2011, 07:47 |
|
#2 |
Senior Member
|
||
February 27, 2011, 09:27 |
thanks
|
#3 |
New Member
Karthikeshwaran Ramasany
Join Date: Feb 2011
Location: chennai
Posts: 4
Rep Power: 15 |
thanks a lot.........
|
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Dynamic Mesh UDF | Qureshi | FLUENT | 7 | March 23, 2017 07:37 |
[Gmsh] 2D Mesh Generation Tutorial for GMSH | aeroslacker | OpenFOAM Meshing & Mesh Conversion | 12 | January 19, 2012 03:52 |
with UDF to change mesh by external mesh generator | zou_mo | FLUENT | 0 | June 30, 2009 07:15 |
Convergence moving mesh | lr103476 | OpenFOAM Running, Solving & CFD | 30 | November 19, 2007 14:09 |
basic of mesh refinement | arya | CFX | 4 | June 19, 2007 12:21 |