Menu

Discussion Forum

New Discussion
Filter

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.

Heat transfer across two metal contact

Posted Jul 31, 2018, 12:50 p.m. EDT Heat Transfer & Phase Change Version 5.3 4 Replies

Jakub Jędrzejewski
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

I would like to simulate heat transfer across a junction built of copper and aluminum. Could you help me how to define the physics?

4 Replies Last Post Aug 1, 2018, 11:18 a.m. EDT
Nichal Gentilal
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 6 years ago Jul 31, 2018, 4:18 p.m. EDT

Hi Jakub,

What kind of help do you need?

Hi Jakub, What kind of help do you need?
Jakub Jędrzejewski
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 6 years ago Aug 1, 2018, 10:23 a.m. EDT

I have a problem with defining physics of my model. I built two blocks, first of aluminum, second copper. On one wall of aluminium block I put temperature. After solving it seems that there's no heat transfer.

I have a problem with defining physics of my model. I built two blocks, first of aluminum, second copper. On one wall of aluminium block I put temperature. After solving it seems that there's no heat transfer.
Nichal Gentilal
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 6 years ago Aug 1, 2018, 10:51 a.m. EDT

Hi Jakub,

It is not necessary a problem. Maybe there is heat transfer but you can not see anything significant because your final time is too small. By my experience when you select the materials of COMSOL library for heat transfer you should be careful because most of them have a high specific heat (more energy is necessary to increase the temperature by 1ºC) and a small thermal conductivity (their are "poor heat conductors"). Plus, it also depends on your initial conditions. My suggestion is that you define a very high temperature in one wall, change your thermal conductivity and specific heat (or even try choosing other materials). Also, increase your final time (at least 10 or 100x times bigger maybe) and refine your mesh if you are expecting a large temperature gradient.

Let us know about your progress.

Best,

Nichal

Hi Jakub, It is not necessary a problem. Maybe there is heat transfer but you can not see anything significant because your final time is too small. By my experience when you select the materials of COMSOL library for heat transfer you should be careful because most of them have a high specific heat (more energy is necessary to increase the temperature by 1ºC) and a small thermal conductivity (their are "poor heat conductors"). Plus, it also depends on your initial conditions. My suggestion is that you define a very high temperature in one wall, change your thermal conductivity and specific heat (or even try choosing other materials). Also, increase your final time (at least 10 or 100x times bigger maybe) and refine your mesh if you are expecting a large temperature gradient. Let us know about your progress. Best, Nichal
Jakub Jędrzejewski
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 6 years ago Aug 1, 2018, 11:18 a.m. EDT
Updated: 6 years ago Aug 1, 2018, 11:44 a.m. EDT

Could you show me an simple example.

edit: I got it, thanks.

Could you show me an simple example. edit: I got it, thanks.

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