The Kapitza Thermal Boundary Resistance Between Two Solids
While investigating the transport of heat in superfluid He, Kapitza (1941) observed a large temperature difference AT between his copper heater and the liquid helium. He deduced that the entire AT occurred very close to the copper-helium interface. It is permissible therefore to define a thermal boundary resistance RK ≡ AT/Q, where Q is the heat flux per unit area of interface. Rk, now called the Kapitza resistance, has been shown to have a temperature dependence of ≈ T-3.
KeywordsCritical Angle Phonon Scattering Phonon Dispersion Solid Helium Thermal Boundary Resistance
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