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 The information provided may be out of date.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.

Modifying Equations in Comsol

Please login with a confirmed email address before reporting spam

Hi Everybody,

We are simulating a water vapor particle rising in water. For the interactions between water and vapor, we need to modify the continuity equation as it is presented in the picture attached.

My question is: how I can add this source term on the right side into the continuity equation?
( I actually need to add some other terms to energy, transport and continuity equations)
Is there any way to verify this change, after I make it? I mean where can I see the modified form of the equation to be sure it is correct.

An idea could be to add a weak contribution by right clicking the physics model. Or should we write them in as weak expressions in the equations view?

Maybe it also worths to mention that there are two physics models, Heat Transfer and Multiphase Flow-Phase Field.

We would appreciate any answers!!

Thanks!



1 Reply Last Post 24 giu 2017, 23:22 GMT-4
COMSOL Moderator

Hello Wolfgang Bernstein

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.


Please login with a confirmed email address before reporting spam

Posted: 7 years ago 24 giu 2017, 23:22 GMT-4
I have the same problem as well, hope someone can help.
I have the same problem as well, hope someone can help.

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.