CFD Online URL
[Sponsors]
Home > Forums > CD-adapco

about simulation of Pulverised coal combustion

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

Reply
 
LinkBack Thread Tools Display Modes
Old   September 1, 2005, 05:50
Default about simulation of Pulverised coal combustion
  #1
kris
Guest
 
Posts: n/a
for coal simulation, peak temperature is suddenly going up very high and concurrently residuals for mass, enthalpy is also negative value to positive value(~10^1 or 10^2 order) very iteration. after 100 or 500 iteration, my simulation is unstable or diverging

as long as i know, source term value of energy equation for Eulerian frame is high by cause of coal combustion model...

I can't solve this problem even though I set limitation of max. temperature as 3000K

Anyway, how can I solve this problem?

next values is diverged values

================================================== ===

PEAK FLAME TEMPERATURES IS 2727.00000000000 IN CELL 1983

UMOM VMOM WMOM MASS T EN DISS ENTH

2.05E+01 6.20E+01 3.02E+01 2.54E+00 5.17E-01 8.26E-01 NaN

**************************************************

* THERE ARE WARNINGS IN FILE star.info

**************************************************

*** SOLUTION DIVERGES/UNSTABLE.

*** CALCULATIONS TERMINATED; NEW FILE.div WRITTEN

STAR-CD Version 3.20.000 Computational Dynamics, Ltd. END OF EXECUTION - STAR CPU TIME IS 1162.38 ELAPSED TIME IS 1214.95 MEMORY (DYNAMIC) USED IS 56 MBYTES

  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
Coal Combustion simulation Yogesh FLUENT 1 April 29, 2014 09:44
Pulverised coal combustion Anders Jungar FLUENT 11 October 28, 2013 02:51
coal combustion simulation cxysohu FLUENT 6 November 2, 2006 03:21
coal briquetts combustion simulation egie FLUENT 3 March 31, 2004 17:55


All times are GMT -4. The time now is 14:36.