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 The information provided may be out of date.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.

problem met in microwave heating module

Posted 2011年1月13日 GMT-5 03:22 Version 4.0a, Version 4.1 2 Replies

Dong Wang
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

I use microwave heating module in comsol to simulate the temperature in a RF combiner. There are two input ports and one output port. In the solving process, I met such problem:

Segregated group X1
Failed to evaluate variable.
- Variable: freq
- Geometry: 1
- Boundary: 10
Failed to evaluate variable.
- Variable: mod1.mh.freq
- Defined as: freq
Failed to evaluate variable.
- Variable: mod1.mh.omega
- Defined as: ((pi*2)*mod1.mh.freq)
Failed to evaluate variable.
- Variable: mod1.mh.iomega
- Defined as: (i*mod1.mh.omega)
Failed to evaluate expression.
- Expression: d((mod1.mh.iomega*mu0_const*(-mod1.mh.Jsportx*test(mod1.tE2x)-mod1.mh.Jsporty*test(mod1.tE2y)-mod1.mh.Jsportz*test(mod1.tE2z)))*(dvol),{test@1})


The boundary 10 is the output port. The frequency for two input ports is 1.84 GHz.

Did anyone know what's the problem? Thank you!

Dong
2 Replies Last Post 2011年4月13日 GMT-4 00:48
COMSOL Moderator

Hello Dong Wang

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.

Bryan Adomanis
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 2011年4月12日 GMT-4 18:17
I am having the same problem! It is on my excited port (used defined, with a constant vertically polarized field and free space propagation constant).

I thought it may have been that my port mesh did not contain enough elements for the frequency I had set under the Frequency-Stationary study, but this did not solve the error...
I am having the same problem! It is on my excited port (used defined, with a constant vertically polarized field and free space propagation constant). I thought it may have been that my port mesh did not contain enough elements for the frequency I had set under the Frequency-Stationary study, but this did not solve the error...
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 2011年4月13日 GMT-4 00:48
Hi

are you sure you have defined the "freq" domain in your solver section ?

--
Good luck
Ivar
Hi are you sure you have defined the "freq" domain in your solver section ? -- 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.

Suggested Content