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

How to define particle-wall restitution coefficient in Eulerian multiphase model ?

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

Like Tree3Likes
  • 3 Post By snow

Reply
 
LinkBack Thread Tools Display Modes
Old   May 30, 2011, 23:35
Default How to define particle-wall restitution coefficient in Eulerian multiphase model ?
  #1
New Member
 
Sangram Roy
Join Date: Jul 2010
Posts: 18
Rep Power: 7
sangramroy is on a distinguished road
Hi,
I am using Eulerian multiphase along with granular model to simulate a circulating fluidized bed. Where do I specify the value for particle-wall restituition coefficient?

Thanks
sangramroy is offline   Reply With Quote

Old   May 31, 2011, 03:32
Default
  #2
New Member
 
Angie
Join Date: Nov 2010
Posts: 17
Rep Power: 6
Angeline is on a distinguished road
hi,

you cannot define it. Instead use specularity coeffcient.
Angeline is offline   Reply With Quote

Old   May 31, 2011, 03:57
Default
  #3
New Member
 
Sangram Roy
Join Date: Jul 2010
Posts: 18
Rep Power: 7
sangramroy is on a distinguished road
Is there any relation between specularity coefficient and particle-wall restitution coefficient?
sangramroy is offline   Reply With Quote

Old   June 1, 2011, 01:59
Default
  #4
New Member
 
Angie
Join Date: Nov 2010
Posts: 17
Rep Power: 6
Angeline is on a distinguished road
I am not sure about this............May be some UDF can be written....
Angeline is offline   Reply With Quote

Old   June 1, 2011, 02:05
Default
  #5
New Member
 
Sangram Roy
Join Date: Jul 2010
Posts: 18
Rep Power: 7
sangramroy is on a distinguished road
hi,

Many results on simulation have been published using both 'particle-particle restitution coeffcient' and 'particle-wall restitution coeffcient' along with 'specularity coefficient'. I am just wondering how is it possible. Are you sure that one cannot specify 'particle-wall coefficient' ?

Thanks
sangramroy is offline   Reply With Quote

Old   June 1, 2011, 06:29
Default
  #6
New Member
 
Rok Sibanc
Join Date: Sep 2009
Posts: 9
Rep Power: 7
snow is on a distinguished road
define -> phases, select secondary phase, set and set Granular Temperature Model to Partial Differential Equation

now you can set coefficient of restitution under Boundary Conditions, wall (for second phase) under multiphase.
zino, mohsen0488 and coolgame2004 like this.
snow is offline   Reply With Quote

Old   June 1, 2011, 06:32
Default
  #7
New Member
 
Sangram Roy
Join Date: Jul 2010
Posts: 18
Rep Power: 7
sangramroy is on a distinguished road
Thanks a lot...!
sangramroy is offline   Reply With Quote

Reply

Tags
eulerian multiphase model, fluidized bed, granular flow

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
Effect of restitution coefficient: Eulerian model Kushagra Mittal CFX 0 August 6, 2007 23:11
about compresive phase James CFX 10 September 12, 2006 03:16
Two-Phase Buoyant Flow Issue Miguel Baritto CFX 4 August 31, 2006 12:02
particle tracking mike CFX 3 April 17, 2006 00:05
Eulerian multiphase model with multicomponents? Shankar FLUENT 1 July 4, 2002 04:36


All times are GMT -4. The time now is 03:29.