Menu

Discussion Forum

New Discussion
Filtra

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.

oxygen gas surface reaction and the product diffusion into the block

Posted 30 mar 2015, 20:50 GMT-4 Chemical Reaction Engineering, Modeling Tools & Definitions, Parameters, Variables, & Functions Version 5.0 2 Replies

Feng Song
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam


there is an boundary condition question on the process of oxygen gas surface reaction and the product diffusion into the block.

oxygen gas reacts with the metal on the metal surface, and the productof metal oxide diffuse into the metal block.
I'm not sure the flux boundary condition.
J=reaction rate or J=reaction rate - dcs/dt, cs is the concentration of metal oxide in the surface of metal.
which one of boundary condition is right for the process?

2 Replies Last Post 31 mar 2015, 06:30 GMT-4
Lasse Murtomäki
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 9 years ago 31 mar 2015, 01:32 GMT-4
Hi

For oxygen the boundary condition is J = -reaction rate, minus sign because oxygen is consumed. For the metal oxide the BC is J = +reaction rate, because it is produced.

BR
Lasse
Hi For oxygen the boundary condition is J = -reaction rate, minus sign because oxygen is consumed. For the metal oxide the BC is J = +reaction rate, because it is produced. BR Lasse
Feng Song
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 9 years ago 31 mar 2015, 06:30 GMT-4
thanks a lot
thanks a lot

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