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

Dasac failure at 400K COPROX

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

Reply
 
LinkBack Thread Tools Display Modes
Old   October 20, 2010, 10:23
Default Dasac failure at 400K COPROX
  #1
New Member
 
Michael McMaster
Join Date: May 2009
Posts: 29
Rep Power: 8
elmcmaster is on a distinguished road
Hi all,

Im doing a simulation in a packed bed for preferential oxidation of CO, though there is a Hydrogen oxidation occuring as well, which has been a source of trouble for temperature.

I think i have tried all ways i can think of to solve the problem, but nothing seems to work apart from when i use the stiff chemistry solver for the pressure based solver.

It keeps printing out that there is a dasac failure at such and such a temperature, then every so often there is a printout of a single iteration, so far it has only managed to do a maximum of five iterations, but the residuals from those five iterations are the best i have seen, no temperature problems.

Beyond this it just prints out dasac failure multiple times continually.

Any ideas about this because the fluent manual returns no results for dasac when searched for
elmcmaster is offline   Reply With Quote

Reply

Tags
coprox, dasac failure

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
dasac failure at temperature=999.97: continuing deco FLUENT 1 June 17, 2014 09:38
dasac failure at Temperature Leverkin FLUENT 4 February 21, 2013 01:52
dasac Valeria FLUENT 0 October 29, 2008 10:53
NEW failure to compile redistributeMeshPar pasinari OpenFOAM Bugs 2 December 31, 2007 05:56
simulation of failure of rivets due to cyclic hea Pal Main CFD Forum 0 July 23, 2002 09:32


All times are GMT -4. The time now is 18:23.