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Heat in inductor using Induction Heating
Posted 19.02.2013, 06:04 GMT-5 Heat Transfer & Phase Change Version 4.3 1 Reply
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I'm working on a model to see the temperature in all of the parts within the inductor. Since I'm using the Induction Heating physics I have to excite the inductor using Lumped Ports. However the simulation only converges when I put one of the boundaries of the big box that surrounds the inductor to a specific temperature.
The questions I have are:
- Is the excitation correct if I want to compare the results with measurements done in real life?
- How can I get around the need to put a boundary to a fix temperature since this isn't accurate with real life?
- Are there any improvements i can do to my model for an even more accurate solution?
I'm currently using COMSOL 4.3, the model geometry is taken from the Model Library > AC/DC module > Inductive devices and coils > inductor_3d.mphbin and the meshing is a Coarse, Physics-controlled mesh.
Thank you in advance
The questions I have are:
- Is the excitation correct if I want to compare the results with measurements done in real life?
- How can I get around the need to put a boundary to a fix temperature since this isn't accurate with real life?
- Are there any improvements i can do to my model for an even more accurate solution?
I'm currently using COMSOL 4.3, the model geometry is taken from the Model Library > AC/DC module > Inductive devices and coils > inductor_3d.mphbin and the meshing is a Coarse, Physics-controlled mesh.
Thank you in advance
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1 Reply Last Post 03.03.2013, 10:28 GMT-5
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Posted:
1 decade ago
Hi
you are in frequency domain: that is you put a constant power into the system, but if you do not fix any external temperature, how do you take out any energy ? If you put no sink, you will integrate and the temperature runs towards INF, no ?
Instead of using a fixed temperature, you could instead use some convective cooling with some "engineering" values for the surface heat exchange, i.e.h=5[W/m^2/K] for a non-forced heat flow, in open air ...
Note that it is very non linear, do a parametric study for excitation voltage from 10 to 10'000 in steps of power of 10
(i.e. time solver t = 10^{range(1,1,4)} )
--
Good luck
Ivar
you are in frequency domain: that is you put a constant power into the system, but if you do not fix any external temperature, how do you take out any energy ? If you put no sink, you will integrate and the temperature runs towards INF, no ?
Instead of using a fixed temperature, you could instead use some convective cooling with some "engineering" values for the surface heat exchange, i.e.h=5[W/m^2/K] for a non-forced heat flow, in open air ...
Note that it is very non linear, do a parametric study for excitation voltage from 10 to 10'000 in steps of power of 10
(i.e. time solver t = 10^{range(1,1,4)} )
--
Good luck
Ivar