# How to set rotating wall as boundary condition

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

 May 25, 2009, 05:22 How to set rotating wall as boundary condition #1 New Member   Babu Join Date: May 2009 Posts: 5 Rep Power: 8 Hi, I am quite new in CFD simulation. I am doing a simulation something like that, there is a rectangular surface. In the surface there is a restriction like a orifice plate(actually another rectangular plate) in the middle position attached to the upper edge. The upper wall is statinary and the lower wall is rotating.the lower wall is actually a shaft. How should I define this roatation as a boundary condition in the lower wall which is rotating. Its a 2d problem. I have defined the problem as a axisymmetric model

 May 25, 2009, 06:31 #2 New Member   tjut-wx Join Date: May 2009 Posts: 14 Rep Power: 8 In my opinion, you can try to use the MRF method,in the fluent help,youcan find the example refered to the MRF! Good luck!

May 25, 2009, 10:51
#3
New Member

Babu
Join Date: May 2009
Posts: 5
Rep Power: 8
Quote:
 Originally Posted by jeniuswx In my opinion, you can try to use the MRF method,in the fluent help,youcan find the example refered to the MRF! Good luck!
I have checked the example. But for my case it is only one reference rotating frame problem. I have also checked the single reference frame example.Could you tell me is it ok if i do like this " I take the rotaing edge(the line as it is 2d) as a wall and define it as a rotational wall and give the value of shaft rotation to that wall. Because there is a option in fluent to do the wall as a rotating wall. But in the example they have given the rotation speed to the fluid zone. Should I give rotation to the fluid zone or only in the inner edge?

 May 25, 2009, 21:01 #4 New Member   tjut-wx Join Date: May 2009 Posts: 14 Rep Power: 8 you should define a fluid zone which contains the edge you said,and then define this zone as a ratation field!

May 26, 2009, 03:45
#5
New Member

Babu
Join Date: May 2009
Posts: 5
Rep Power: 8
Quote:
 Originally Posted by jeniuswx you should define a fluid zone which contains the edge you said,and then define this zone as a ratation field!
Should I make different zone for the near rotaing wall section or should I take all the fluid as rotating?

 May 29, 2009, 05:08 #6 New Member   Anupam Jain Join Date: May 2009 Posts: 5 Rep Power: 8 Consider entire fluid zone as rotating.

 August 3, 2011, 12:02 #7 New Member   soroush.armd@yahoo.com Join Date: Jul 2011 Posts: 5 Rep Power: 6 hi I want to model a liquid film on a rotating disk,I use axisymmetric swirl,is it correct? I heard something about moving refrence frame!does it work for my modeling? tnx!

December 14, 2013, 05:48
#8
Member

subhas hunasikatti
Join Date: Sep 2013
Posts: 32
Rep Power: 3
Quote:
 Originally Posted by babu I have checked the example. But for my case it is only one reference rotating frame problem. I have also checked the single reference frame example.Could you tell me is it ok if i do like this " I take the rotaing edge(the line as it is 2d) as a wall and define it as a rotational wall and give the value of shaft rotation to that wall. Because there is a option in fluent to do the wall as a rotating wall. But in the example they have given the rotation speed to the fluid zone. Should I give rotation to the fluid zone or only in the inner edge?

Hi friend i am ding cpu cooling system problem, in this i have to given the SNPS FAN rpm , please tell me how can i give the fan rpm in fluent....

thank you
with regards
subhas

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post gokul patil FLUENT 2 June 19, 2014 05:07 Ssn FLUENT 0 January 25, 2008 04:43 Virginie FLUENT 2 October 2, 2007 09:23 Luke FLUENT 0 June 7, 2006 11:54 fluideniro Main CFD Forum 12 December 24, 2003 02:10

All times are GMT -4. The time now is 22:40.