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Rotating geometries; approaches in CFD

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Old   October 12, 2006, 08:58
Default Rotating geometries; approaches in CFD
  #1
chuck
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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
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Old   October 12, 2006, 10:03
Default Re: Rotating geometries; approaches in CFD
  #2
sam
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these are MRF and mixing plane
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Old   October 12, 2006, 10:08
Default Re: Rotating geometries; approaches in CFD
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chuck
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Thanks sam. No I have sth. I can search for!
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Old   October 12, 2006, 10:33
Default Re: Rotating geometries; approaches in CFD
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chuck
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typo: I wanted to write "Now I have sth. I can search for!"
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Old   October 12, 2006, 11:10
Default Re: Rotating geometries; approaches in CFD
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sam
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ok search more for mixing plane and its development and let me know wat u understood then we can discuss a bit more
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Old   October 12, 2006, 12:48
Default Re: Rotating geometries; approaches in CFD
  #6
chuck
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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.
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Old   October 12, 2006, 13:04
Default Re: Rotating geometries; approaches in CFD
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Ben
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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.
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Old   October 12, 2006, 13:05
Default Re: Rotating geometries; approaches in CFD
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Ben
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http://www.cd-adapco.com/press_room/...cs/23/mrf.html try that.....
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Old   October 12, 2006, 15:58
Default Re: Rotating geometries; approaches in CFD
  #9
boling2002
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Besides the sliding mesh, one thing you can try is overset(chimera) grid.
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Old   October 13, 2006, 09:24
Default Re: Rotating geometries; approaches in CFD
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chuck
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Hello, is mixing plane the same as sliding mesh?
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Old   October 13, 2006, 11:40
Default Re: Rotating geometries; approaches in CFD
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sam
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no.
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Old   October 14, 2006, 09:51
Default Re: Rotating geometries; approaches in CFD
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dingxi
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They are totally different, I think
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Old   October 14, 2006, 09:54
Default Re: Rotating geometries; approaches in CFD
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dingxi
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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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