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.

Failure to create correct Temperature profile

Christos Kostantopoulos

Please login with a confirmed email address before reporting spam

Hello,

I am new user of COMSOL and I would like to explain my problem. I have a pellet of magnetite, where I try to heating up with Joule effect. The pellet has 13mm diameter and height of 2mm. Below the pellet I design two small boxes 0.27mm0.27mm0.27mm that I use them as electrodes from copper, and they are placed in a symmetric distance of 4.13mm from the pellet's center of the lower surface. The outer surface of the first electrode, is my (Terminal) Electric Potential where with V=V0=21V and the symmetric place of the other electrode to be my ground. The Tref and the Tamb=500K and I used a Temperature boundary condition where the wall temperature of the pellet is constant T=500K. The upper and lower surface of the pellet within electrodes to be characterized with the default boundary condition of thermal Insulation. My first question is why the temperature profile doesn't give me the expected one. I mean to have a hot zone between the electrodes, and the only hot zone is two half spheres above the electrodes (one and one). The Second question that I want to quote is, why changing the electrodes' dimentions with the same V I have different Q when the material properties is the same.

Thanks in advance.



0 Replies Last Post 2018年11月13日 GMT-5 11:02
COMSOL Moderator

Hello Christos Kostantopoulos

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.