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I'm recently doing research on thermal transport in constriction geometries, and want to get the diffusive constriction resistance for two planar films but with rectangular cross section. I have searched for many literature, but all of them are talking about the planar films with circular interface, which is 1/(2ka) and a is the radius of the orifice. Therefore, I'm posting for any suggestions to get the resistance in the rectangular cross section condition.

Thanks in advance!

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# What is the constriction resistance for two planar films?

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