Menu

Discussion Forum

New Discussion
查找

Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.

Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.

"open boundry" or "no flux" setting did not make a difference in diffusion calculation

Posted 2011年9月16日 GMT-4 16:10 Chemical Reaction Engineering Version 4.2 0 Replies

Feng Gui
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Hi,

I am simulating a diffustion of a species through a block geometry. It should be simple. Basically, the species had a concentration at the entrance surface (one side) and the initial concentration in the block was zero. I did two calculations. In the first one, I set all surfaces except the entrance surface as "open boundry" and in the 2nd calculation, I set all surfaces except the entrance surface as "no flux". The results did not show any difference. I would expect in the former there would be outward flux on the open boundry surfaces. Did I do something wrong here? can anyone help?

Thanks a lot...
0 Replies Last Post 2011年9月16日 GMT-4 16:10
COMSOL Moderator

Hello Feng Gui

Your Discussion has gone 30 days without a reply. If you still need help with COMSOL and have an on-subscription license, please visit our Support Center for help.

If you do not hold an on-subscription license, you may find an answer in another Discussion or in the Knowledge Base.

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.

Suggested Content