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-   -   Rotating Pipe inside a stationary pipe (http://www.cfd-online.com/Forums/star-ccm/112719-rotating-pipe-inside-stationary-pipe.html)

Richy February 4, 2013 05:11

Rotating Pipe inside a stationary pipe
 
Hi all

I'm relatively new to star ccm+ and I am having a problem modelling a rotating pipe inside a stationary pipe. The problem arises when I split the regions, so I have a region for each pipe. When I attempt to mesh the volume I get an error saying that I need to check my region/boundary definitions. The problem may be that I am using the wrong interface. Any suggestions?

Hmwf February 6, 2013 07:08

Multiple region
 
If you are working with multiple regions, you have to define one mesh and physics model per region. Look in the properties window for your region to set the right model.

francois February 6, 2013 11:23

Hi all,

I would like to do the same thing (i.e taylor couette or rotor/stator problem) but the StarCCM+ documenation is IMHO very poor on this subject.

Can someone help us on this simple problem or give us some links or tutorials to understand how it could be done.

Any help will be welcome.

Cheers
François

Richy February 7, 2013 05:10

Hmwf, would I have to do as you said if the physics/meshing models will be the same?

I have taken a step back, and just modeled two pipes contra-rotating. In the CAD model I left a gap between the pipes of 1 mm. I then selected overset mesh between the pipes and created an in-place interface. Each of the pipes had their own rotating reference frame (obviously opposite directions). This seemed to give the predicted results. Is this correct?


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