CFD Online Logo CFD Online URL
Home > Forums > CFX

How to specify the mesh moving mode in CFX

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Display Modes
Old   August 18, 2007, 21:26
Default How to specify the mesh moving mode in CFX
Posts: n/a
Hi all,

I want to simulate a rigid section oscillating in air with sinosoidal heaving or pitch displacement.I have successfully deal with problem in my self-developed code for easy mesh generated case through ALE.But now I want to carry it out in CFX, since I can obtain mesh with good quility.However, I donot know how to define the moving mode of the mesh.In my opinion, there is no need to repeatly form mesh at each time step, since I can use an oscillating coordinate system with the mesh rigidly fixed with it.

Anyway,I donot know how to deal with the mesh,also a tutorial about simulation for rigid oscillating section is very much appreciated.

  Reply With Quote

Old   August 20, 2007, 12:29
Default Re: How to specify the mesh moving mode in CFX
Posts: n/a
I have implemented non-inertial coordinate system using bouyancy and boundary conditions (sub sonic flow).

For body motions [0,0,a*Sin(omega*t)] : Define all inlets & outlets as openings with cartesian velocity components [0,0,-a*omega*Cos(omega*t)]. Allow bouyancy & define gravity as [0,0,a*(omega^2)*Sin(omega*t)].

  Reply With Quote

Old   August 27, 2007, 20:04
Default Re: How to specify the mesh moving mode in CFX
Posts: n/a

Did you mean you use the same mesh configuration for all time step?So you avoid importing or forming different mesh on different time step.In this case,do you use stationary B.C. for the rigid body which means zero wind velocity on the body surface?

For rigid body vertical motion, it maybe easy to understand your implementation.While,how to deal with the torsional motion of the rigid body.

All the best.

  Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Turbulence model for CFX moving mesh songxguan CFX 7 June 28, 2009 21:05
Icemcfd 11: Loss of mesh from surface mesh option? Joe CFX 2 March 26, 2007 18:10
moving mesh in cfx eleazar solve everything CFX 5 March 6, 2007 02:41
hex mesh using cfx mesh. mehul CFX 3 December 12, 2005 23:06
C4 = 1 for Moving Mesh Xobile CD-adapco 2 January 18, 2005 06:22

All times are GMT -4. The time now is 07:47.