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 The information provided may be out of date.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.
floating potential node and potential distribution
Posted 1 avr. 2014, 17:12 UTC−4 Low-Frequency Electromagnetics, MEMS & Nanotechnology, MEMS & Piezoelectric Devices, Modeling Tools & Definitions, Parameters, Variables, & Functions Version 4.3 0 Replies
Please login with a confirmed email address before reporting spam
I'm simulating a piezoelectric block that is depressed by a uniform load. I have set the top plate as floating potential and the bottom as a ground.
I'll like to ask what does setting Qo=0 mean. does it set the initial charge on this plate to be zero and any extra charges generated due to the load will then cause the top plate to have a voltage? Also, since I'm able to get a voltage, why is it that I can't get the charge density on the plate.
Another question is about plotting the surface plot of potential. When I have a curved piezo-layer and I depress it, there will be a terminal voltage generated. However, the potential distribution in the surface plot is not a smooth gradient along the whole curved surface. As in there will be max potential at the middle instead of having the max potential at the top (floating potential node). Is this due to how potential is calculated in comsol? Thanks.
Hello Lionel Wong
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.