CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > Siemens > STAR-CCM+

Problems involved heat transfer inside a particle and its thermal degradation

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   August 20, 2011, 23:52
Default Problems involved heat transfer inside a particle and its thermal degradation
  #1
New Member
 
zhangrong
Join Date: Aug 2011
Posts: 4
Rep Power: 14
zhangr is on a distinguished road
Hello, guys!

Firstly, a brief description of my simulaiton: I want to inject a coal particle at the top of a reactor which is assumed to be a vertical tube, and with the influence of the gravity force, the particle will fall down. Before such, I would introduce the nitrogen gas at the bottom of the tube, which would be at the temperature of 600℃. So during the process of falling down of the particle, it will be heated by the gas, and at the same time, the degradation of the particle will occur. Particle track is tackled by Lagrangian approach, while the gas is dealed with by Eular one. My questions are below:
1. How to simulate the temperature distribution along the radius of the particle by the STAR ? Just as you know, the gas introduced from the bottom will heat the particle, but as a matter of fact, as an item whose volume could not be neglected, along the radius of the particle, there should be a temperature gradient.
2.How to simulate chemical reaction of the particle ? The reaction I want to simulate is such: Coal→Char + Volatile. This reaction will be one-order for all the species involved. Arrhenius equation will be used, and all the parameters to use are clear.
Is there anybody can give me some suggestions or instruction?
zhangr is offline   Reply With Quote

Old   August 20, 2011, 23:57
Default
  #2
New Member
 
zhangrong
Join Date: Aug 2011
Posts: 4
Rep Power: 14
zhangr is on a distinguished road
Before I forget, the version of software I used for my simulation is STAR CCM+6.02.
zhangr is offline   Reply With Quote

Old   August 25, 2011, 07:59
Default
  #3
New Member
 
zhangrong
Join Date: Aug 2011
Posts: 4
Rep Power: 14
zhangr is on a distinguished road
nobody has similar experience??
zhangr 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



All times are GMT -4. The time now is 04:09.