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 The information provided may be out of date.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.

Difference in comsol concentration information

Posted 2015年9月3日 GMT-4 07:32 Computational Fluid Dynamics (CFD), Chemical Reaction Engineering Version 4.4 0 Replies

Houari Cobas
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Hello, I am experiencing a problem with concentration calculation in comsol. I want to calculate the concentration at channel output boundary. I am using transport of diluted species with laminar flow. When I use the boundary probe to calculate the average vaule of concentration of species c, I obtain the value 5326 mol/m3 which have a error relative to the theoretical value of 10.1 %. In the other hand, when I use the option Concentration of Species c, at Outflow 1 (chds.c0avg_c_out1) the concentration value is 5792 mol/m3 which have a error relative to the theoretical value of 2.2 %.

What should i be doing wrong? Why those difference for the "same" average concentration calculated at the same output boundary?

In my opinion both calculated values should be equal. So i assume I am facing an erro but i do not know how to solve it.

Could you please give me an ideia about it?

thank you very much
0 Replies Last Post 2015年9月3日 GMT-4 07:32
COMSOL Moderator

Hello Houari Cobas

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