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-   -   Rotating geometries; approaches in CFD (http://www.cfd-online.com/Forums/main/12395-rotating-geometries-approaches-cfd.html)

chuck October 12, 2006 08:58

Rotating geometries; approaches in CFD
 
Hello,

as far as I'm concerned rotating geometries are a very difficult problem in CFD because of the high mesh deformation. But what are the most common methods when we have rotating geometries such as impellers and so on?

Have a nice day!

Chuck

sam October 12, 2006 10:03

Re: Rotating geometries; approaches in CFD
 
these are MRF and mixing plane

chuck October 12, 2006 10:08

Re: Rotating geometries; approaches in CFD
 
Thanks sam. No I have sth. I can search for!

chuck October 12, 2006 10:33

Re: Rotating geometries; approaches in CFD
 
typo: I wanted to write "Now I have sth. I can search for!"

sam October 12, 2006 11:10

Re: Rotating geometries; approaches in CFD
 
ok :) search more for mixing plane and its development and let me know wat u understood then we can discuss a bit more

chuck October 12, 2006 12:48

Re: Rotating geometries; approaches in CFD
 
Do you know any book or paper on this issue? It is very hard to find information on "mixing plane" or MRF via google. I can only find documents where there is said that a certain method was used, but without explanation.

Ben October 12, 2006 13:04

Re: Rotating geometries; approaches in CFD
 
try rotating reference frame or similar but MRF is not the best approach to rotating geometries, its fairly good for easy quick results but is not as accurate as proper moving mesh. A better approach is to use either a sliding moving mesh or a deforming mesh where the connectivity at the rotating interface. This way the cells are re-defined as the mesh slides.

Ben October 12, 2006 13:05

Re: Rotating geometries; approaches in CFD
 
http://www.cd-adapco.com/press_room/...cs/23/mrf.html try that.....

boling2002 October 12, 2006 15:58

Re: Rotating geometries; approaches in CFD
 
Besides the sliding mesh, one thing you can try is overset(chimera) grid.

chuck October 13, 2006 09:24

Re: Rotating geometries; approaches in CFD
 
Hello, is mixing plane the same as sliding mesh?

sam October 13, 2006 11:40

Re: Rotating geometries; approaches in CFD
 
no.

dingxi October 14, 2006 09:51

Re: Rotating geometries; approaches in CFD
 
They are totally different, I think

dingxi October 14, 2006 09:54

Re: Rotating geometries; approaches in CFD
 
For simulation of turbomachinery flow field with a stator and rotor, is there any chance to use sliding mesh or overset grid if the steady flow governing equations are to be solved?


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