CFD Online Logo CFD Online URL
Home > Forums > FLUENT

Coal Devolatilisation

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

LinkBack Thread Tools Display Modes
Old   February 24, 2009, 21:44
Default Coal Devolatilisation
James Macphee
Posts: n/a
Firstly thankyou to anyone that responds to my question. Your help is greatly appreciated.

My question relates to the two competing rates devolatilisation model. I am modelling pulverised coal fired through an swirling burner into a furnace. I have information on the proximate and ultimate analysis and high temperature volatile yield of the coal.

I am using the two mixture fraction/PDF approach and defining the volatiles as the emperical secondary stream. When I set values for the mass fraction of each element should I take into consideration the high temperature yield or just use the values from the ultimate analysis. From what I understand my coal flame does not necessarily achieve the high temp yield but is probably more than the proximate analysis yield that is found under slow(???) heating conditions. Also should I keep the second weighting factor as 1 or set it to the high temp yield fraction that I know.

Thanks again for any help. I am stuck as to where to go with this.

  Reply With Quote


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 Devolatilisation James Macphee FLUENT 0 February 24, 2009 21:45
coal combustion jarek CFX 4 November 28, 2007 01:23
Coal Combustion DFS CFX 0 August 28, 2007 04:57
can Star-cd32 solve coal/non-coal particle? Leo Siemens 1 October 25, 2004 15:38
Coal with EBU Magnus CFX 2 September 14, 2001 01:34

All times are GMT -4. The time now is 06:40.