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

flow around cylinders

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

Reply
 
LinkBack Thread Tools Display Modes
Old   January 25, 2012, 10:20
Question flow around cylinders
  #1
New Member
 
aounallah
Join Date: Jan 2012
Posts: 5
Rep Power: 5
aoun is on a distinguished road
Hi every one,

I simulate turbulent crossflow around tube bundle (many tubes: 7 rows by 7 columbs) using different turbulence models.

the convergence is very hard since the residual of continuty equation is relatively high 10^-2 ??

who can I getting a fully converged system khowing that I have minimise the under-relaxation factors, modifies the scheme of disretization,

what other things ?
aoun is offline   Reply With Quote

Old   January 25, 2012, 10:48
Default
  #2
Senior Member
 
shoeb khan
Join Date: Nov 2011
Posts: 179
Rep Power: 5
shk12345 is on a distinguished road
Quote:
Originally Posted by aoun View Post
Hi every one,

I simulate turbulent crossflow around tube bundle (many tubes: 7 rows by 7 columbs) using different turbulence models.

the convergence is very hard since the residual of continuty equation is relatively high 10^-2 ??

who can I getting a fully converged system khowing that I have minimise the under-relaxation factors, modifies the scheme of disretization,

what other things ?
Just try to use coupled scheme for discretization it gives the best and fastest convergence

If it is also not working then try to refine your mesh and decrease the squeness of your mesh


hope that helps
shk
shk12345 is offline   Reply With Quote

Old   January 25, 2012, 14:20
Default
  #3
Senior Member
 
Join Date: Jun 2011
Posts: 108
Rep Power: 6
mali28 is on a distinguished road
Quote:
Originally Posted by aoun View Post
Hi every one,

I simulate turbulent crossflow around tube bundle (many tubes: 7 rows by 7 columbs) using different turbulence models.

the convergence is very hard since the residual of continuty equation is relatively high 10^-2 ??

who can I getting a fully converged system khowing that I have minimise the under-relaxation factors, modifies the scheme of disretization,

what other things ?
Here are some general guidelines which can help you get a converged solution:

http://cape-forum.com/index.php/topic,17.0.html
mali28 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
Compressible flow, no data at the outlet mireis FLUENT 1 July 28, 2010 05:22
Can 'shock waves' occur in viscous fluid flows? diaw Main CFD Forum 105 November 20, 2009 05:19
Mass flow and U-Mom flow in CFX Zhihua Xie CFX 0 September 3, 2007 09:49
PROBLEMS WITH ROTATING FLOW BETWEEN TWO CYLINDERS vitmalin CFX 2 October 11, 2006 07:22
Question on 3D potential flow Adrin Gharakhani Main CFD Forum 13 June 21, 1999 05:18


All times are GMT -4. The time now is 20:35.