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

Coal Combustion simulation

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   February 13, 2008, 06:58
Default Coal Combustion simulation
  #1
Yogesh
Guest
 
Posts: n/a
I'm working on tangential fired boiler simulation now and have the following queries.

1. DPM injection of coal: When I define dpm injections for coal particles, the mass flow rate of the injection is on dry-ash-free basis or jus the coal flow rate as such. Because, I am converting the heating value of coal to daf basis. While creating PDF table, I give the elemental composition on daf basis. But during the dpm injection, my injecting particle is Coal medium volatile.

2. I am interested in obtaining heat flux through the wall. While defining the boundary conditions for the wall I am defining wall temperature and internal emissivity. I am using the values 1200 K and 0.65. Are they fair enough? Or is there anyway of arriving with more exact numbers for a specific case?

3. As the dpm iterations proceed (i'm having a dpm iteration for every 20 continuous phase iterations), the number of particle escaped is decreasing and the no of particles incomplete is increasing. why is this happening? does it got any significance?

Thanks from, Yogesh
  Reply With Quote

Old   April 29, 2014, 09:44
Default
  #2
Member
 
Maaz Ul Mosaid
Join Date: Jan 2014
Location: Pakistan
Posts: 32
Rep Power: 12
maazulmosaid is on a distinguished road
Have you got any success ? please share with me
maazulmosaid is offline   Reply With Quote

Old   March 20, 2024, 14:19
Unhappy Boiler Coal combustion Modeling
  #3
New Member
 
Lethukuthula Vilakazi
Join Date: Nov 2023
Posts: 2
Rep Power: 0
Naturel1990 is on a distinguished road
Good Day

Anyone who has a tutorial on the subject, I am having a hard time finding comprehensive coal combustion modelling techniques. most papers just share the models activated, but when i applied, you find that there is definetly missing information.
If anyone can assist, please help. Thanks
Naturel1990 is offline   Reply With Quote

Reply

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
Nonpremixed Combustion Model for Coal Gasification C.Y.Ler FLUENT 2 April 29, 2014 09:51
Help me for the simulation on hydrogen/air combustion xulixian CFX 1 April 16, 2009 16:57
Coal combustion tutorial Chetan FLUENT 3 May 4, 2007 01:11
Modelling Coal Combustion like a fluid Dr. Flow Squad FLUENT 1 March 21, 2007 14:47
coal combustion simulation cxysohu FLUENT 6 November 2, 2006 03:21


All times are GMT -4. The time now is 02:50.