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harmonic perturbation in frequency domain analysis for heat transfer
Posted 19.10.2017, 17:45 GMT-4 Heat Transfer & Phase Change, Studies & Solvers Version 5.3 1 Reply
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Hi, I just found that the v5.3 has the frequency domain perturbation analysis for heat transfer, which sounds really useful to me.
Here is what I would like to do: when the tempeature of a compoent in my system is perturbed by a samll amount (let's say 0.1 degree) at some particular frequency (100 Hz, for example), I would like to know the total dissipated power in one perturbation period (which is 0.01 second in this case). I have a feeling that this is something related to the heat flux or the temperature gradient and I hope Comsol could directly give out this value, but I am not sure. Can anyone help me with this? Many many thanks in advance!
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By the way, I tried playing with this new feature just for a very short while. I found that if the perturbation harmonic frequency is a littile bit high (>1000 Hz in my case), then it doesn't work properly becasue the first step, which is the stationary solution step, doesn't show proper solution anymore. I hope COMSOL could provide a demo model to explain how this feature should work.