Menu

Discussion Forum

New Discussion
Filter

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 The information provided may be out of date.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.

Total power dissipation density value is different across studies

Posted Apr 10, 2018, 11:46 a.m. EDT Electromagnetics, Electromagnetic Heating, Low-Frequency Electromagnetics Version 4.3b 0 Replies

Nichal Gentilal
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Hi,

I have been performing some simulations in COMSOL using a cube 0.20.20.2 m^3. First I performed a frequency domain study (frequency: 200 kHz, electric currents module) by setting +10V at one side of the cube and -10 V at the opposite side of it and extracted the total power dissipation density value (using "ec.Qh") from there. From the results I obtained I concluded that this is the RMS value and not the amplitude. Next, I used that value on a time-transient heat problem (module: heat transfer in solids. I also selected the electric solution in "values not solved for") as a heat source. However, when I plotted the variable "ec.Qh" to obtain the total power dissipation density using the solution from the heat study as the data set I got the amplitude value instead of the RMS value.

Any hint on why does COMSOL does not use the same value for "ec.Qh" for both studies? It seems to me that the RMS value is the correct value to be used and I can relate the amplitude and the RMS values easily, but I would like to know more about this issue. The .mph file: https://drive.google.com/drive/folders/1QW7h4oXKG-poaOytwMTdgjMFGPzGZC_q?usp=sharing

Thanks in advance. Regards, Nichal

0 Replies Last Post Apr 10, 2018, 11:46 a.m. EDT
COMSOL Moderator

Hello Nichal Gentilal

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