Abstract
It was seen that the contact interface consists of a number of discrete and small actual contact spots separated by relatively large gaps. These gaps may be evacuated or filled with a conducting medium such as gas. In the first case, all of the heat is constrained to flow through the actual contact spots. If the gaps are filled with a conducting medium, however, some of the heat flow lines are allowed to pass through the gaps, that is, they are less constrained and thus the constriction is alleviated to some extent.
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Madhusudana, C.V. (2014). Thermal Constriction Resistance. In: Thermal Contact Conductance. Mechanical Engineering Series. Springer, Cham. https://doi.org/10.1007/978-3-319-01276-6_2
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