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Different results with parametric sweep in induction heating model

Posted Sep 10, 2012, 8:02 p.m. EDT Electromagnetic Heating, Low-Frequency Electromagnetics, Heat Transfer & Phase Change, Studies & Solvers Version 4.0a 1 Reply

vsatchouk
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Hi all,

I'm using COMSOL 4.0a to model a 2D axisymmetric model of an induction heater. The real device runs at 62kHz, and when I run a Frequency-Transient study at that frequency for 60 seconds, I get a peak temperature of 426K. However, when I run a Frequency-Transient study with a parameter sweep between 0 and 100kHz, the peak temperatures I get are MUCH lower than without the parameter sweep.

However, when I look at the solution for 60 seconds at 60kHz, I get a peak temperature of 312K. Why is this? I would love to attach the input file, but its 20Mb and it won't let me. Where should I look? What should I check?

Thanks!
1 Reply Last Post Sep 11, 2012, 3:17 a.m. EDT
Pu
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Posted: 1 decade ago Sep 11, 2012, 3:17 a.m. EDT
I think that's because the solution depends on the initial guess, which can be different for different approaches.
I think that's because the solution depends on the initial guess, which can be different for different approaches.

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