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 The information provided may be out of date.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.

failed to evaluate variables

Please login with a confirmed email address before reporting spam

Hi ,

I am building a 3d model of fluid flowing around a wafer using 4.3a. The following error occured when I tried to plot the pressure on the edge of the wafer.




Cannot ecaluate expression.

Failed to evaluate variable.
- Variable: mod1.p
- Geometry: 1
- Domain: 5

Failed to evaluate expression.
- Expression: mod1. p
- plot: lngr3(line graph)

Domain 5 is the wafer in my geometry. Can anybody help me out please?

1 Reply Last Post 2013年3月13日 GMT-4 07:11
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 2013年3月13日 GMT-4 07:11
Hi

"p" is the pressure, if its a dependent variable it sould be called as "p". Now you might have played with the physics when defining the model, such that COMSOL has called the pressure p2 or p3 (in cae of several "p's" then you should check the name of the dependent variables (main physics nodes - dependent variable tab adn then compare with the one of the plot call

--
Good luck
Ivar
Hi "p" is the pressure, if its a dependent variable it sould be called as "p". Now you might have played with the physics when defining the model, such that COMSOL has called the pressure p2 or p3 (in cae of several "p's" then you should check the name of the dependent variables (main physics nodes - dependent variable tab adn then compare with the one of the plot call -- Good luck Ivar

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.