CFD Online Logo CFD Online URL
Home > Forums > FLUENT

Porous wall boundary condition in LES

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

LinkBack Thread Tools Display Modes
Old   May 31, 2007, 06:17
Default Porous wall boundary condition in LES
Posts: n/a
Hello everybody,

I want to perform Large Eddy Simulations of gas flowing in channels with porous walls. Transport of gas between channels (via the porous walls) might be important. Since the walls are not impermeable, the Reynolds stresses at the walls will be different compared to impermeable (normal) walls. Therefore, I am not sure how applicable normal LES wall treatment (i.e. either resolving the flow down to the wall or using wall functions, depending on mesh quality) will be... or whether I could trust the results using any of the porous models in FLUENT (which will essentially just turn off solving the turbulence model's equations in the porous zone and introduce a viscous and/or inertial resistance)...

So, my questions are: 1) How could I (initially) set up wall boundary conditions that more correctly will reflect the fact that the walls are porous and not impermeable? 2) How could I (at a later stage in the process) model the porous walls between the channels, without having to mesh them explicitly?

Does anybody have any experience, information or references on these issues? Any input is highly appreciated!

Thanks in advance, Henrik
  Reply With Quote


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
Natural convection in a closed domain STILL NEEDING help! Yr0gErG FLUENT 3 June 12, 2013 02:12
UDF setting wall boundary condition with a DEFINE_PROFILE NLao FLUENT 1 April 17, 2011 05:23
Defined Wall Shear Stress Boundary Condition mart.hein OpenFOAM Programming & Development 1 April 14, 2011 12:44
Wall boundary condition in cylindrical co-ordinate shekharc Main CFD Forum 3 December 2, 2009 09:20
Multicomponent fluid Andrea CFX 2 October 11, 2004 05:12

All times are GMT -4. The time now is 08:08.