Menu

Discussion Forum

New Discussion
Filtrer

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 The information provided may be out of date.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.

Analytical field of point charge

Posted 27 avr. 2012, 16:57 UTC−4 Modeling Tools & Definitions, Parameters, Variables, & Functions Version 3.5a 0 Replies

Subhra Paul
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Hello,

I have created the simplest possible model of electrostatics: just one point charge in space and applied 1C charge to it. The model is in electrostatics, a box is defined as outer boundary and on it "ground" boundary condition is applied.

But the problem is the electrostatic potential (V) obtained from this COMSOL model is less than what i am getting from analytic formula which states V=Q/(4*pi*epsilon_0*r) where r is the distance between the point charge and observation point.

After that I created another one with two charges: one +1C and another -1C, but still its V is not matching with analytic.

I have no idea what possibly can be going wrong. I have made boundary sufficiently huge enough.
Could somebody help me in this?

Thanks in advance.
0 Replies Last Post 27 avr. 2012, 16:57 UTC−4
COMSOL Moderator

Hello Subhra Paul

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.

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