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 The information provided may be out of date.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.

AC/DC module ground problem

Please login with a confirmed email address before reporting spam

Hi
i am new to comsol, i am working on an electrostatic, I want to get the electric field due to a charge distribution, but when i work without ground, i got an unexpected solution totaly, and when I use a ground, it affects the answer, so is there is any way to get electric field without putting a ground?
thanks in advance

1 Reply Last Post 21.08.2013, 06:00 GMT-4
Edgar J. Kaiser Certified Consultant

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 21.08.2013, 06:00 GMT-4
Hi,

what I understand from your post is that you want the electric field of a charge distribution in free space. You don't need to define ground for that but you have to make sure that the outer boundary of the model volume is defined properly and it is far enough away from the region of interest. You could consider using infinite elements.

Cheers
Edgar
--
Edgar J. Kaiser
emPhys Physical Technology
Hi, what I understand from your post is that you want the electric field of a charge distribution in free space. You don't need to define ground for that but you have to make sure that the outer boundary of the model volume is defined properly and it is far enough away from the region of interest. You could consider using infinite elements. Cheers Edgar -- Edgar J. Kaiser emPhys Physical Technology

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.