CFD Online Logo CFD Online URL
Home > Forums > FLUENT

Convergence problem

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

LinkBack Thread Tools Display Modes
Old   August 6, 2009, 09:50
Default Convergence problem
New Member
Join Date: May 2009
Posts: 12
Rep Power: 8
qascapri is on a distinguished road
I am simulating a two-pass channel with ribs. All walls are at contant temperature. At inlet velocity is set as BC while at outlet is pressure.
The mesh size is about 4.5 Million cells. The problem is that I am not getting convergence.
The residuals can be seen in the snap attach..
Please anybody who can tell me what can I do...I canged the relxation fators. The effect of them can be seen in snaps where the values drops promptly.
The convergence level as set to in order of 10-6 for continuity while 10-9 for energy.
As one can see the residuals comes to a constant value which is far from the required value....
Also y+ value was 0.12 at maximum...I used realisable verison of k-epsilon model with wall treatment...
Attached Images
File Type: jpg case112.JPG (96.1 KB, 16 views)
qascapri is offline   Reply With Quote


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
Convergence of CFX field in FSI analysis nasdak CFX 2 June 29, 2009 01:17
convergence problem alexandre FLUENT 2 June 14, 2007 14:31
convergence problem ammi reddy FLUENT 1 March 28, 2007 17:01
3D Fluid Flow Convergence problem Emily FLUENT 2 March 21, 2007 23:18
Non Convergence of 3D Heat transfer cfd problem Balraj Main CFD Forum 3 December 9, 2004 01:24

All times are GMT -4. The time now is 21:40.