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-   -   how to treat the rotating zone in multiple reference frame (MRF) (http://www.cfd-online.com/Forums/fluent/74430-how-treat-rotating-zone-multiple-reference-frame-mrf.html)

 Jiuan March 31, 2010 13:18

how to treat the rotating zone in multiple reference frame (MRF)

I am studying the Tutorial 10 in Fluent, which is "Using multiple rotating reference frames". The whole simulation domain is divided into three fluid zones. The middle zone is the rotating zone, and it is attached to a moving reference frame in "cell zone conditions". I don't understand why the rotating fluid zone should be attached to a rotating reference frame. Can I do this way: the whole domain is ketp as one domain, I mean it is not divided into three zones, and I just define the moving boundary conditions for the surfaces of the blade, which is wall-7 in this tutorial. Thanks.

 Jade M May 10, 2010 15:17

In general, if the rotating fluid zone is solved in a stationary reference frame, then the problem becomes transient and multiple meshes need to be read in throughout the simulation. As the mesh becomes too deformed, then a new mesh needs to be used. For a more automated choice, remeshing can also be utilized. The advantage of the moving reference frame is that the problem becomes steady and a single mesh can be used throughout the simulation. I hope this is helpful.

 Susan YU May 21, 2010 05:06

Re

I'm making a calculation by using the rotating reference frame, but I found I cannot make the heat transfer calculation on the rotating wall. Do you have some suggestion on this type of calculation?

Thanks

 Jade M May 24, 2010 11:42

Hi Susan, I'm sorry as I do not know how to do this. I would suggesting posting a new thread and maybe someone will be able to answer. Good luck!

 Susan YU May 24, 2010 22:58

Thanks, I will do that

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