CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > CFX

convergence problem in the turbomachinery problem.

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   September 7, 2010, 03:07
Default convergence problem in the turbomachinery problem.
  #1
New Member
 
uk jha
Join Date: Apr 2009
Posts: 16
Rep Power: 17
u k jha is on a distinguished road
what are the issue for the convergence of a simulation. In my case I am solving a centrifugal fan problem. In which I am simulating the impeller as well as the volute. I imposed the boundary conditions at
1) inlet : total pressure (0 pa relative pressure)
2) Outlet : mass flow rate:
3) impeller : Rotating wall;
4) casing :stationary wall;
I am using the k- omega turbulence model for solving the turbulent quantities.
I set the convergence criteria as 10e-4 for the velocities and the turbulence quantities.
I am solving the momentum equations with High resolution scheme.
I got struck when the simulation is not conversing up to the 10e-4. but I want it must touch the criteria of the 10e-5.
Can anyone help me where may be the problem? Please suggest me. Thank you.
u k jha is offline   Reply With Quote

Old   September 7, 2010, 19:41
Default
  #2
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,867
Rep Power: 144
ghorrocks is just really niceghorrocks is just really niceghorrocks is just really niceghorrocks is just really nice
http://www.cfd-online.com/Wiki/Ansys...gence_criteria
ghorrocks is offline   Reply With Quote

Reply

Tags
convergence issues, turbomachinery

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
convergence problem commonyue Main CFD Forum 1 December 1, 2009 04:54
Submerged fin, Convergence problem supermouniette FLUENT 10 July 6, 2009 11:47
Convergence of CFX field in FSI analysis nasdak CFX 2 June 29, 2009 02:17
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 12:49.