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.
Magnetic field created by a DC wire
Posted 2021年4月3日 GMT-4 15:12 2 Replies
Please login with a confirmed email address before reporting spam
Hello,
I am a former user of 3.5 version. Now I have switched to 5.5 and I am trying to evaluate the magnetic field created by a DC current though a wire (in 3D), and I have problems.
I have draw the wire as a solid cilinder and the infinite lay as a sphere containing it, selected the materials (copper and air) and the external current option in the magnetic analysis (assigning a J0 to the wire), but it does not work.
The error shows: no solution found. Singular matrix. Empty ecuations. Solution not converging.
May I get any help please?
Thanks in advance
Gabriel
Please login with a confirmed email address before reporting spam
You are not the first person to experience that problem. First, there are a number of application modes, and it makes a difference which one you choose. Second, in general you will need to set the conductivity of your empty-space (air around the wire) to be non-zero. (It can be small, but it can't be zero or the solution can't proceed.) If those hints don't help you enough to find a configuration that works, then I suggest that you post your model to the forum and someone here will likely take a closer look at it and give you more specific advice.
-------------------Scientific Applications & Research Associates (SARA) Inc.
www.comsol.com/partners-consultants/certified-consultants/sara
Please login with a confirmed email address before reporting spam
It works!! Thanks a lot Robert!!
Kind regards
Gabriel