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

Non-Uniform girds in SIMPLE

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

Reply
 
LinkBack Thread Tools Display Modes
Old   June 12, 2003, 14:50
Default Non-Uniform girds in SIMPLE
  #1
Mike
Guest
 
Posts: n/a
Hi,

I have written a code for NS equations for a duct flow with variable density and viscosity based on SIMPLE method. I tried to improve the acuracy by usung nonuniform grids, however I noticed that the convergence criteria is different. In the uniform grid the term b in pressure equation become very close to zero (say order of 10^-12 to 10^-16), while in the nonuniform grid it does not change, no matter how many iterations I use and the order is about 10^-4. To my surpirse the results are very similar. Am I doing something wrong or is it normal to observe such a thing? Has anyone used non-uniform grids in a cyclindrical system so I can verify my code?
  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
chtMultiRegionSimpleFoam javad814 OpenFOAM 1 September 26, 2011 13:30
Need help with boundary conditions: open to atmosphere Wolle OpenFOAM 2 April 11, 2011 07:32
turbulent jet simulation antonio_ing OpenFOAM Running, Solving & CFD 5 September 16, 2010 02:31
rhoSimpleFoam claco OpenFOAM 7 April 20, 2010 04:32
RasInterFoam STRANGE RESULTS AT BOUNDARY kumar2 OpenFOAM Running, Solving & CFD 8 March 24, 2008 19:38


All times are GMT -4. The time now is 02:05.