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 The information provided may be out of date.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.

total energy and loss in piezo model

Please login with a confirmed email address before reporting spam

Hello,

I'm trying to determine the quality factor in a MEMS piezo resonator. But, I'm having difficulty calculating the total energy and loss. The piezo interface comes with W_tot and Q_h,tot already defined as pzd.W_int and pzd.Qh_int, respectively. But COMSOL tells me these are unknown variables. How else can I define the total energy and loss? I haven't been able to hit on the right way to do it.

Thanks so much.
Kamala

2 Replies Last Post 2012年12月13日 GMT-5 06:38
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 2011年12月31日 GMT-5 06:14
Hi

have you chekecd the FORUM, this has been discussed several times, and I believe its also treated in the model library, in at least one of the models

--
Good luck
Ivar
Hi have you chekecd the FORUM, this has been discussed several times, and I believe its also treated in the model library, in at least one of the models -- Good luck Ivar

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 2012年12月13日 GMT-5 06:38
I'm new to comsol and I met the same problems as you.Have you already solved it?Could you please help me?
I'm new to comsol and I met the same problems as you.Have you already solved it?Could you please help me?

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.