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Thermal simulations: watt per second.
Posted 21.07.2015, 11:33 GMT-4 Heat Transfer & Phase Change, Materials, Studies & Solvers Version 5.1 3 Replies
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Hello,
I have modelled an IC and I would like to set a block in my model (the IC) that produces a heat wave that is spread through the other components: PCB, solderballs, etc.
I am using the 'Heat transfer in solids' module. How can I set my boundary condition to increase the produced heat (power) of the IC block at 1 watt/second?
I have used time-dependent simulation and I have set my solver to the range 0-10 seconds, with step 1 second. But I cannot figure out how I can make it work... to increase the power of the IC.
Thank you alot beforehand
I have modelled an IC and I would like to set a block in my model (the IC) that produces a heat wave that is spread through the other components: PCB, solderballs, etc.
I am using the 'Heat transfer in solids' module. How can I set my boundary condition to increase the produced heat (power) of the IC block at 1 watt/second?
I have used time-dependent simulation and I have set my solver to the range 0-10 seconds, with step 1 second. But I cannot figure out how I can make it work... to increase the power of the IC.
Thank you alot beforehand
3 Replies Last Post 31.07.2015, 03:00 GMT-4
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Posted:
9 years ago
Hi
If I understand correctly you have a domain or boundary heat source, so if you want it to heat up more and more as a function of the time "t" you must enter a function depending on "t" in the filed for the heat source. Instead of i.e. 5[W] or 5[W/m^3] (depending on your options) choose 5[W/s]*t or better make a nice continuous analytical function under the Definition node i.e an1(t) and use that as source term.
In COMSOL (almost) each field can accept a scalar but also and just as well an equation !
--
Good luck
Ivar
If I understand correctly you have a domain or boundary heat source, so if you want it to heat up more and more as a function of the time "t" you must enter a function depending on "t" in the filed for the heat source. Instead of i.e. 5[W] or 5[W/m^3] (depending on your options) choose 5[W/s]*t or better make a nice continuous analytical function under the Definition node i.e an1(t) and use that as source term.
In COMSOL (almost) each field can accept a scalar but also and just as well an equation !
--
Good luck
Ivar
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Posted:
9 years ago
Hello,
sorry for the late answer and thank you for the reply!
I will try to apply ypur solution.
sorry for the late answer and thank you for the reply!
I will try to apply ypur solution.
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Posted:
9 years ago
Hello,
I tried to apply your solution and I have a question about it. In the equation 5[W/s]*t, the time will be taken from the step I define in the time-solver? E.g. from 0 to 10 sec, with step 1 second, or I have to define the time in a function?
Thank you very much beforehand.
Regards,
Dimitrios
I tried to apply your solution and I have a question about it. In the equation 5[W/s]*t, the time will be taken from the step I define in the time-solver? E.g. from 0 to 10 sec, with step 1 second, or I have to define the time in a function?
Thank you very much beforehand.
Regards,
Dimitrios