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

Combustion of wood

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

Reply
 
LinkBack Thread Tools Display Modes
Old   November 10, 2004, 06:36
Default Combustion of wood
  #1
Simon Steinmeyer
Guest
 
Posts: n/a
Hello,

I would like to simulate a combustion process of wood: I have definied the simplified mixture in prePDF and would like to inject the fuel as a non-premixed combustion. But I can't choose "prepdf-mixture" in the injection panel. How can I inject the fuel? In the "Boundary Conditions"-Panel, I can't find a suitable option, too.

Thanks, Simon Steinmeyer
  Reply With Quote

Old   November 10, 2004, 18:53
Default Re: Combustion of wood
  #2
Ryan
Guest
 
Posts: n/a
To do a particle injection using the prepdf model, set the particle type to combisting-particle. The devolatilization kinteics and fixed carbon can then be changed in the combusting particle materials panel. To inject the fuel through a boundary condition (such as a velocity inlet), set the mixture fraction variable to 1. Use of a velocity inlet in this manner is generally used for gaseous fuels.

Ryan
  Reply With Quote

Old   November 11, 2004, 05:26
Default Re: Combustion of wood
  #3
Simon Steinmeyer
Guest
 
Posts: n/a
Thanks, that helped a lot.
  Reply With Quote

Old   August 4, 2011, 08:26
Default
  #4
New Member
 
Join Date: Aug 2009
Posts: 5
Rep Power: 7
aruv is on a distinguished road
Hello Simon.

I am working with Fluent to simulate the combustion of wood particles (edge ​​length: 8mm). I use the following models: Energy on, Viscous SST k-omega, DO Radiation and species non-premixed combustion. The wood particle is defined as a porous media and the porosity is changing with increasing temperature. This is done by an udf. The problem is that the particle does not heat up when I am working with the non-premixed model. My oxidizer comes with 1293 K as nitrogen and oxygen in the combustion chamber and the fuel (volatiles and co) is released as a function of temperature in the particle via udf. But the temperature in the particle doesn't increase.

Does the non-premixed-combustion model not include conduction?

Thanks in advance for your efforts.

Maria
aruv is offline   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
Wood Devolatilation and Volatile combustion nutow FLUENT 1 February 18, 2015 03:35
combustion of wood shavings Özer AYDIN FLUENT 0 September 16, 2008 05:40
Simple approach - solid wood combustion (newbie..) Dan Main CFD Forum 0 December 3, 2007 03:06
combustion of wood Özer AYDIN FLUENT 4 June 25, 2007 03:11
wood shaving combustion Özer AYDIN FLUENT 0 November 23, 2006 07:52


All times are GMT -4. The time now is 03:11.