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Thermal expansion and joule heating
Posted Nov 23, 2015, 11:37 a.m. EST Version 5.2 1 Reply
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Hello,
I am trying to model the thermal expansion and joule heating physics in a complex model in Comsol. At the moment I am using just a simple cable, where I want to apply a current source of 900A for a period of time and check the results. I attach the model.
I don't have any information regarding the voltage, so I just assumed a 30 kV source, but I am not sure if it is needed at all.
Also it seems, I have some problems, when using the electrical power dissipation as a heat source.
Please can you check it and advice?
For any question, please let me know.
Kind regards,
Pavlos.
I am trying to model the thermal expansion and joule heating physics in a complex model in Comsol. At the moment I am using just a simple cable, where I want to apply a current source of 900A for a period of time and check the results. I attach the model.
I don't have any information regarding the voltage, so I just assumed a 30 kV source, but I am not sure if it is needed at all.
Also it seems, I have some problems, when using the electrical power dissipation as a heat source.
Please can you check it and advice?
For any question, please let me know.
Kind regards,
Pavlos.
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1 Reply Last Post Nov 23, 2015, 12:01 p.m. EST
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Posted:
9 years ago
Hello Pavlos,
Your electric boundary conditions appear incorrectly set up. I would expect a known voltage (or total current) at one end and a ground at the other. In any case, the Busbar tutorial in the Application Library includes detailed instructions on how to set up a model combining those physics. That model is found also in the Introduction to COMSOL Multiphysics manual, which you can access through File > Help > Documentation, and also here: www.comsol.com/documentatio/IntroductionToCOMSOLMultiphysics.pdf
Best,
Jeff
Your electric boundary conditions appear incorrectly set up. I would expect a known voltage (or total current) at one end and a ground at the other. In any case, the Busbar tutorial in the Application Library includes detailed instructions on how to set up a model combining those physics. That model is found also in the Introduction to COMSOL Multiphysics manual, which you can access through File > Help > Documentation, and also here: www.comsol.com/documentatio/IntroductionToCOMSOLMultiphysics.pdf
Best,
Jeff