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

 Register Blogs Members List Search Today's Posts Mark Forums Read

 March 31, 2010, 12:18 how to treat the rotating zone in multiple reference frame (MRF) #1 Member   Dongzi Wei Join Date: Mar 2009 Posts: 33 Rep Power: 17 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.

 May 10, 2010, 14:17 #2 Senior Member   Join Date: Feb 2010 Posts: 148 Rep Power: 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. Last edited by Jade M; May 14, 2010 at 12:01.

 May 21, 2010, 04:06 Re #3 New Member   Join Date: Mar 2009 Posts: 7 Rep Power: 17 Hi, Jade, 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

 May 24, 2010, 10:42 #4 Senior Member   Join Date: Feb 2010 Posts: 148 Rep Power: 17 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!

 May 24, 2010, 21:58 #5 New Member   Join Date: Mar 2009 Posts: 7 Rep Power: 17 Thanks, I will do that