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

shell conduction

Register Blogs Community New Posts Updated Threads Search

Like Tree1Likes
  • 1 Post By ComputerGuy

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   December 14, 2010, 17:03
Talking shell conduction
  #1
New Member
 
lyly
Join Date: Nov 2010
Posts: 24
Rep Power: 16
ezabille is on a distinguished road
hi ;
when i define boundary conditions in wall coupled (fluent 3d scheme)
i saw option shell conduction
i would like to know what is this option
and when i use it?
ezabille is offline   Reply With Quote

Old   December 14, 2010, 19:19
Default
  #2
Senior Member
 
Real Name :)
Join Date: Jan 2010
Location: United States
Posts: 192
Rep Power: 16
ComputerGuy is on a distinguished road
From the following http://my.fit.edu/itresources/manual...g/node573.htm:

By default, FLUENT treats walls as zero thickness presenting no thermal resistance to heat transfer across them. If a thickness is specified for walls then the appropriate thermal resistance across the wall thickness is imposed, although conduction is considered in the wall in the normal direction, only. There are applications, however, where conduction in the planar direction of the wall is also important. For these applications, you have two options: you can either mesh the thickness or you can use the shell conduction approach. Shell conduction can be used to model thin sheets without the need to mesh the wall thickness in a preprocessor. When the shell conduction approach is utilized, you have the ability to easily switch on and off conjugate heat transfer on any wall. When you specify a thickness for the wall, a material property, and toggle the Shell Conduction switch in the Wall panel, then during the solution process FLUENT automatically grows a layer of prism cells or hex cells for the wall, depending on the type of face mesh that is utilized.

Shell conduction can be used to account for thermal mass in transient thermal analysis problems such as soaking. It can also be used for multiple junctions and allows heat conduction through the junctions. Shell conduction can be applied on boundary walls as well as internal walls.


The following is a list of limitations for the shell conduction model:
  • Shells cannot be created on non-conformal interfaces.
  • Shell conduction is not available for 2D.
  • Shell conduction is available only when the pressure-based solver is used.
  • Shell conduction cannot be used with the non-premixed or partially- premixed combustion model.
  • When used in conjunction with the Discrete Ordinates (DO) radiation model, shell conducting walls cannot be semi-transparent and it should not be used with the DO/Energy Coupling Method.
  • Shell conducting walls cannot be split or merged. If you need to split or merge a shell conducting wall, you will need to turn off the Shell Conduction option for the wall (in the Wall panel, perform the split or merge operation, and then enable Shell Conduction for the new wall zones.
  • The shell conduction model cannot be used on a wall zone that has been adapted. If you want to perform adaption elsewhere in the computational domain, be sure to use the mask register described in Section 27.11.1. This will ensure that adaption is not performed on the shell conducting wall.
  • Fluxes at the ends of a shell conducting wall are not included in heat balance reports. These fluxes are accounted for correctly in the FLUENT solution, but are not listed in the flux report.
Abdo Shams likes this.
ComputerGuy is offline   Reply With Quote

Old   December 15, 2010, 18:42
Default thnks
  #3
New Member
 
lyly
Join Date: Nov 2010
Posts: 24
Rep Power: 16
ezabille is on a distinguished road
thank u very much i have a 3d model and for heat trnsfaer
and heat transfear by conduction and radiation
between two volumes there is a coupled wall have athikness
so should i turn on the shell conduction?
ezabille is offline   Reply With Quote

Reply


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
shell conduction (urgent) muhittin FLUENT 4 September 24, 2013 04:30
Convection with Shell Conduction Corentin FLUENT 7 January 30, 2012 14:12
How exactly does the Shell conduction in FLUENT? srinidhi4u FLUENT 0 September 15, 2009 08:30
shell conduction @ thin walls Jiri Beran FLUENT 0 May 18, 2008 15:08
Shell conduction and Conjugate problem RBM FLUENT 1 October 24, 2005 13:20


All times are GMT -4. The time now is 22:51.