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

scalar convergence

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

Reply
 
LinkBack Thread Tools Display Modes
Old   June 29, 2005, 18:19
Default scalar convergence
  #1
CFD-Student
Guest
 
Posts: n/a
I'm modeling atmospheric flow over a cubic obstacle with h2 dispersion (buoyancy on) behind the building. I'm runing a transient case. I'm having trouble fixing my model to correct the following messeges:

*** WARNING #009 ***THE VALUE OF SCALAR SC1 IN CELL 36 ( -6.7978-320) IS BELOW THE MINIMUM ( 0.0000E+00)

SCALAR VALUES BELOW THE ACCEPTALE MINIMUM FOUND AT *** CELLS (after 100 time steps)

*** WARNING #013 *** MAXIMUM SPECIFIED CORRECTOR STAGES 20 REACHED BEFORE CONVERGENCE CRITERION IS SATISFIED.

-SCALAR EQUATION 1 NOT CONVERGE-

I suppose these are related. I have read all messeges that I could find on this problem... still not really clear on what to do.

For the scalar equation I'm using the CD (BF=1) 150 sweeps and 0.01 residual tolerance

Performed a grid check (tetrahedral) and the only prblems are a few angles (face) below limit

Avg Courant No. between 10-1

any suggestions?

THANKS A LOT!

Hector
  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
scalar meaning usker CD-adapco 3 July 6, 2008 11:26
Passive Scalar Andy R FLUENT 0 January 10, 2007 15:49
scalar ? pr Main CFD Forum 2 September 1, 2003 00:26
CO Scalar Values Ted CD-adapco 0 February 4, 2003 21:48
Convergence Problem with Species Coupled w/Scalar Chia Ni FLUENT 0 December 9, 2002 06:11


All times are GMT -4. The time now is 16:49.