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Changing the physics applied after time frame

Posted Jul 24, 2017, 1:35 p.m. EDT 1 Reply

Gabriel Papadatos
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Hello all,

I am running COMSOL 4.2, with the AC/DC and the Heat transfer modules. I have built a model that simulates the temperature change caused by joule heating in an electrochemical cell. However, the simulation I need to run now involves an additional heat source that does not activate until 1 hour into the simulation. Is this a process I can program into the simulation?

Thank You
1 Reply Last Post Jul 25, 2017, 2:22 a.m. EDT
Jens Krause
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Posted: 7 years ago Jul 25, 2017, 2:22 a.m. EDT
Say your heat source is Q then you can enter Q*(t>1[h]).

This simple way has a jump discontinuity and you may want to replace it
with a smoothed step function.

Regards

Jens
Say your heat source is Q then you can enter Q*(t>1[h]). This simple way has a jump discontinuity and you may want to replace it with a smoothed step function. Regards Jens

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