dT/dt

Hi

I cannot work out how to get dT/dt ( temperature variation rate) when using COMSOL. I am a beginner and currently using a version 4. I am modelling the heat transfer of a thin pyroelectric solid and I do not know how to get a plot of dTemperature/dTime against time. I have attached a paper below which pretty much gives the results I am looking for. I just need to work out how they did it.


Thanks

Faizan
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