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

PEMFC module + multiple periodic boundary conditions

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

Reply
 
LinkBack Thread Tools Display Modes
Old   June 3, 2014, 16:29
Default PEMFC module + multiple periodic boundary conditions
  #1
Senior Member
 
Vesselin Krastev
Join Date: Jan 2010
Location: University of Tor Vergata, Rome
Posts: 363
Rep Power: 11
vkrastev is on a distinguished road
Hi all,

I guess that my question is rather trivial, but till now I haven't found a good answer. I want to simulate a relatively simple PEMFC configuration, which closely resembles the standard tutorial that is quite popular among Fluent users: basically, I have a single anodic channel which faces a single cathodic channel, with all the related current collectors, gas diffusion layers, catalist layers and the PEM in the middle; the only differences compared to the tutorial are that 1) the geometry is not symmetric (i. e. the two channels are not aligned), so a non conformal interface is required to match the cathodic and anodic parts of the domain; 2) I would like to impose periodic boundary conditions in the cross-stream direction.
The problem is with point 2), since periodic boundary conditions seem not to work as they should. Just to add some additional info:

a) I'm working with Ansys Fluent 13

b) the mesh is made of hexas and it works perfectly if I change the lateral BCs to, e. g., simple walls

c) there should be multiple and adjacent periodic BCs, since the PEMFC module requires the definition of different volume zones (one periodic boundary for each zone)

d) I tried to create each periodic boundary using the TUI commands mesh>modify-zones>make-periodic, and everything looked fine, without errors; however, once initialized the solution, when I tried to run the calculation the following error occurred:

Error: fluent.13.0.0 received a fatal signal (SEGMENTATION VIOLATION)

I'm starting to think that there could be some limitation in the usage of periodic boundaries, either due to the multiple adjacent BCs or specifically linked to the PEMFC module. If someone has some experience or hint about this topic I will be happy to know his/her opinion.

Thanks in advance

V.
vkrastev is offline   Reply With Quote

Old   June 8, 2014, 06:09
Default
  #2
Senior Member
 
Vesselin Krastev
Join Date: Jan 2010
Location: University of Tor Vergata, Rome
Posts: 363
Rep Power: 11
vkrastev is on a distinguished road
No one interested in this topic?
vkrastev is offline   Reply With Quote

Old   December 22, 2014, 05:15
Default
  #3
Member
 
Join Date: Nov 2014
Posts: 31
Rep Power: 3
maverick123 is on a distinguished road
Hi vkrastev,

I am using 15 and I didn't face any problem with non-conformal periodic interfaces with PEMC module.
I guess, it is fixed in 14.5.7
http://www.infinite.nl/assets/Upload...5.7-Update.pdf

Best Regards
maverick123 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
Wind turbine simulation Saturn CFX 45 February 8, 2016 05:42
Radiation interface hinca CFX 15 January 26, 2014 18:11
An error has occurred in cfx5solve: volo87 CFX 5 June 14, 2013 17:44
periodic boundary conditions fro pressure Salem Main CFD Forum 21 April 10, 2013 00:44
Periodic boundary conditions happy5jump FLUENT 5 January 29, 2013 17:06


All times are GMT -4. The time now is 01:06.