CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > FLUENT

Periodic boundary conditions

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

Reply
 
LinkBack Thread Tools Display Modes
Old   August 14, 2008, 12:08
Default Periodic boundary conditions
  #1
happy5jump
Guest
 
Posts: n/a
Hi everyone,

I'm modling a 360 degrees cylinder

I just want to use a 9 degrees slide to simulate the whole geometry.

I set the left and right walls as periodic boundaries.

Now I have two Questions:

1. how to set periodic boundary condition in FLUENT? There's no help in FLUENT about periodic boundary....

2. What does this periodic boundary condition mean?

Is there any relation with the calculation?

Does periodic boundary mean it can simulate the real whole geometry?

Thanks
  Reply With Quote

Old   August 14, 2008, 17:09
Default Re: Periodic boundary conditions
  #2
red lemon
Guest
 
Posts: n/a
Both face sets represent the entire single periodic zone. Use the TUI command Grid>modify zone>make-periodic to create and slit periodic to remove. A periodic means flow through one face comes out of the other. For a regular periodic like turbo cases you need not set anything such as dP or flow in Define>periodics in the GUI. Fluent and Gambit see default periodics as conformal face sets but you can in fact define non conformal periodics using define>grid interface>make periodics. Hope that helps!

  Reply With Quote

Old   August 14, 2008, 18:18
Default Re: Periodic boundary conditions
  #3
happy5jump
Guest
 
Posts: n/a
Thanks!

One more thing I want to know is

This is a 40 inlets geometry Can I just use 1 inlet ,1 outlet, and periodic boundary condition to samulate the whole geometry?
  Reply With Quote

Old   August 18, 2008, 00:39
Default Re: Periodic boundary conditions
  #4
mAx
Guest
 
Posts: n/a
yes you can use only one inlet one your 9deg slice. But regarding the mesh, your both periodic faces have to be linked (eg: same mesh) Gambit won't you allow to set them as periodic if the surface meshes aren't the same.
  Reply With Quote

Old   November 17, 2012, 20:34
Default help in periodic
  #5
New Member
 
fares
Join Date: Nov 2012
Posts: 2
Rep Power: 0
fares is on a distinguished road
I have the same problem I want to make the two opp walls at the inlet and outlet of a blade passage to be periodic how can i do so? in fluent 14
fares is offline   Reply With Quote

Old   January 29, 2013, 17:06
Default
  #6
New Member
 
Mohammad A. Hossain
Join Date: Sep 2012
Posts: 4
Rep Power: 4
mhossain is on a distinguished road
Quote:
Originally Posted by red lemon
;152809
Both face sets represent the entire single periodic zone. Use the TUI command Grid>modify zone>make-periodic to create and slit periodic to remove. A periodic means flow through one face comes out of the other. For a regular periodic like turbo cases you need not set anything such as dP or flow in Define>periodics in the GUI. Fluent and Gambit see default periodics as conformal face sets but you can in fact define non conformal periodics using define>grid interface>make periodics. Hope that helps!
Hi,

I have a problem defining the periodic BC in FLUENT. I am simulating a wind turbine blade with one blade and 120 degree domain. but while I apply periodic BC in TUI , I got an error massage that main face and shadow face does not have same number of elements. one of my wall have 465 faces and the corresponding shadow face has 510 face.

How can I fix this problem? Is there any way to fix this problem in FLUENT ? I truly appreciate your suggestions.

Arif
mhossain is offline   Reply With Quote

Reply

Thread Tools
Display Modes

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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
how to set periodic boundary conditions Ganesh FLUENT 13 January 22, 2014 05:11
PERIODIC BOUNDARY CONDITIONS P.R.NAREN FLUENT 1 May 14, 2005 12:51
Periodic Boundary Conditions ! Krik FLUENT 1 March 22, 2005 19:50
periodic boundary conditions Satish Perivilli FLUENT 0 January 28, 2005 12:54
Periodic Boundary Conditions+NSE Isa Main CFD Forum 1 December 20, 2003 08:03


All times are GMT -4. The time now is 15:17.