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

Coal combustion in a fixed bed

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   May 19, 2001, 19:16
Default Coal combustion in a fixed bed
  #1
Ghabi
Guest
 
Posts: n/a
Can you please tell me how to shose the boundry conditions in a fixed bed combustion of coal. Thanks
  Reply With Quote

Old   May 20, 2001, 02:38
Default Re: Coal combustion in a fixed bed
  #2
John C. Chien
Guest
 
Posts: n/a
(1). If you don't know what to do with the boundary conditions, then try to simulate it as if you are running the test. (2). In the testing, you will have to know something, or measure something, and that will give you the boundary location and conditions. (3). Apparently, you can't specify the condition at the surface of the coal. It is burning and the surface is most likely irregular. (4). So, you need to define the inlet conditions and location away from the coal bed. You also need to model the coal bed so that you can simulate the coal burning.
  Reply With Quote

Old   June 7, 2001, 11:41
Default Re: Coal combustion in a fixed bed
  #3
I. Dotsikas
Guest
 
Posts: n/a
Hallo

actually fixed bed reactors are very important in chemical engineering. There is a vast amount of research articles in almost any chemical journal. From such sources you can see how the equations look like, and set up your own equations that describe the funktion your a fixed bed. for example: do you have to calculate axial diffusion in your fluid?

By the way do you use one , two or three dimensional equations? There are some very important approximations like the Vortmayer description of the flow field in a fixed bed reactor, that might be quite usefull to you.

best regards,

Jannis
  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
Coal gasification - Eulerian - Fixed bed oliveagp FLUENT 23 May 3, 2018 14:30
Coal combustion and ash reaction kinetics sega Fluent UDF and Scheme Programming 0 January 21, 2010 09:05
fixed bed combustion Adi FLUENT 7 April 19, 2001 02:20
Fixed Bed Combustion Stanley FLUENT 21 March 22, 2001 11:18
Combustion of Solids in fixed bed Ghabi Chekib Main CFD Forum 1 December 20, 2000 05:05


All times are GMT -4. The time now is 11:12.