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Comsol heat partition machining simulation

Posted 2014年9月9日 GMT-4 04:17 Heat Transfer & Phase Change Version 4.4 1 Reply

Ali Markov
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Consider to solid bodies with different thermal conductivity in contact and heat is generated in the surface which is in between two solids. The question is how to arrange the heat distribution, so that 60% of generated heat flows in one solid and rest 40% in another.
1 Reply Last Post 2014年9月10日 GMT-4 09:33
Pieter Westerik
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Posted: 10 years ago 2014年9月10日 GMT-4 09:33
So there is a heat source at the interface, and 60% of this heat generated should go one side, and the other 40% to the other side. This can only be arranged as such if heat cannot flow between these two domains, otherwise you can put 60% in one side, but if its temperature is higher than the other domain, the heat will flow back into the other domain immediately, resulting in a distribution that is different from 60:40. From a physical perspective this is also what you would expect to happen if the two materials are in thermal contact, so then there would be no way of controlling the distribution of the heat generated. But you can enforce the distribution if you treat the two domains separately (maybe use separate physics nodes?), and for each domain make a heat influx boundary with the right amount of heat flowing in.
So there is a heat source at the interface, and 60% of this heat generated should go one side, and the other 40% to the other side. This can only be arranged as such if heat cannot flow between these two domains, otherwise you can put 60% in one side, but if its temperature is higher than the other domain, the heat will flow back into the other domain immediately, resulting in a distribution that is different from 60:40. From a physical perspective this is also what you would expect to happen if the two materials are in thermal contact, so then there would be no way of controlling the distribution of the heat generated. But you can enforce the distribution if you treat the two domains separately (maybe use separate physics nodes?), and for each domain make a heat influx boundary with the right amount of heat flowing in.

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