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A way to model a source of heat which is very short (time)
Posted 13 juin 2012, 09:46 UTC−4 Version 4.2a 1 Reply
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Hello. I need help about a modelling of H2-O2 combustion. I need to model the source of heat which is generate by the candle of ignition. But i don't found a way to do it. Is there any function to do understand to COMSOL that the source of heat last a short time? If anyone have some ideas, i will be very happy to hear him. Sincerely.
1 Reply Last Post 14 juin 2012, 07:12 UTC−4
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Posted:
1 decade ago
Hi Julien,
you can multiply the temperature T that you define for your heat source material with a function, e.g.:
temperature of your material = T * some_self_defined_pulse_function
You can define your pulse function (or any combination of several functions) in a way, that its value will be increasing from 0 to 1 in a very short time and afterwards will decrease from 1 to 0 again. In this way, you will have a short "heat pulse" during a time interval that you can define yourself.
Check Comsol's doc for functions (e.g. "Gaussian Pulse", "Ramp", "Step", and so on). Hope this helps!
Good luck,
Juergen
you can multiply the temperature T that you define for your heat source material with a function, e.g.:
temperature of your material = T * some_self_defined_pulse_function
You can define your pulse function (or any combination of several functions) in a way, that its value will be increasing from 0 to 1 in a very short time and afterwards will decrease from 1 to 0 again. In this way, you will have a short "heat pulse" during a time interval that you can define yourself.
Check Comsol's doc for functions (e.g. "Gaussian Pulse", "Ramp", "Step", and so on). Hope this helps!
Good luck,
Juergen