CFD Online URL
[Sponsors]
Home > Forums > FLUENT

Sawdust Combustion-Non-premixed Combustion Model

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

Reply
 
LinkBack Thread Tools Display Modes
Old   June 16, 2007, 18:35
Default Sawdust Combustion-Non-premixed Combustion Model
  #1
Jessy
Guest
 
Posts: n/a
I have 2 questions regarding combustion of sawdust in a furnace. My sawdust burners are located on top of the coal burners in my furnace.

Question 1: from Define -> Models -> Species -> transport&reaction, in the 'Table' tab in Species model, FLUENT asks for 2 temperatures, fuel and Oxid. can anyone advise me what are the 2 values appropriate to my case? The sawdust enters with primary air (at 300K) and hot flue gas from coal burning below is 1300K.

Question 2: when I define pdf-mixture material, what are the suitable values for transport properties, ie thermal conductivity and viscosity?

Really hope someone can help me with these!! Looking forward for your replies and thank you in advance!!

Jessy
  Reply With Quote

Old   June 19, 2007, 11:59
Default Re: Sawdust Combustion-Non-premixed Combustion Mod
  #2
Thandavam
Guest
 
Posts: n/a
Hi, The appropriate temperature must be judged by the person who have done the experiments. You must be familiar that you are trying to model vapor phase combustion of the fuel.

Oxygen can exist at room temp

secondly the properties can be constant to start with. Later if you feel like the the properties are varying much inside the domain. you can either use poly nomial kind of variation or u can use kinetic theory

Thandavan
  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
Non Premixed Combustion santhosh1987 FLUENT 2 April 10, 2013 05:24
premixed combustion using Zimont model bob FLUENT 7 November 22, 2012 06:50
How can I model H2-AIR combustion popi CFX 8 August 16, 2007 06:32
Premixed combustion in Spark Ignition engine kevin FLUENT 1 June 23, 2006 03:59
Need Similar Combustion Tutorial as my model Arnab CD-adapco 0 May 24, 2005 19:23


All times are GMT -4. The time now is 21:23.