CFD Online Discussion Forums

CFD Online Discussion Forums (
-   CFX (
-   -   Moving mesh in CFX (

ali8500 January 13, 2012 01:52

Moving mesh in CFX
Hi Guys,

I'm going to move a flat plate up and down sinusoidally in CFX. The simulation is 2D. Does any one know How I should tackle this problem? I will appreciate, if you help me. tnx


ghorrocks January 14, 2012 06:52

Can you post an image of what you want to do? Is the plate vertical or horizontal?

ali8500 July 31, 2012 19:10


Sorry for replying late. Please have look at the tutorial posted on "". On page 3, you'll see a figure which is similar to my problem. I wan to move the middle zone sinusoidally with a flat plate. Could u please help how I can simulate this problem in CFX?


ghorrocks July 31, 2012 19:25

Have a look at the CFX tutorials. Several of them show how to model moving mesh.

ali8500 August 1, 2012 00:31

Hi Glenn,

In CFX we only have two options: stationary domain and rotating domain. In my problem, which is a 2D simulation, I want to move both the fluid within the domain as well as a flat plate sinusoidally up and down. This means that domain itself should also move sinusoidally. The plate in my simulation follows this equation (v=A*sin(wt)), where v is the vertical component of velocity. Do I need to specify the same motion for mesh deformation? (mesh motion> specified displacement> Y=v) Does it make sense?


ghorrocks August 1, 2012 07:58

The two options you refer to are for rotating frame of reference simulation. You are looking for moving mesh, that is different.

Look at the CFX tutorials for moving mesh examples, not rotating examples.

MrinalKR September 25, 2012 15:23

Can you please explain what is the difference between moving mesh and rotating frame of reference simulation with suitable examples?
when and where it is using??

ghorrocks September 25, 2012 18:56

Moving mesh allows any mesh motion. Rotating mesh only allows rotating motion, which I guess could be considered a sub-set of moving mesh.

MrinalKR September 25, 2012 23:52

Thank you sir..
Can we produce translational along with rotational motion in CFX?
I want to create translational and rotational motion of circle in CFX? Is it possible?
any similar tutorials are available?

ghorrocks September 26, 2012 08:18

Yes, it is possible but you then have to use general mesh motion. You cannot model translation with rotating frames of reference.

All times are GMT -4. The time now is 23:57.