The thermal resistance in both superfluid phases of 3He has been measured at 20.0 and 29.6 bar in zero magnetic field. Heat conduction in 3He-B is shown to be primarily hydrodynamic, and a regime of reproducible heat flow behavior in the A phase is reported. The viscosity of each phase as a function of temperature is calculated using an equation of the two-fluid model, and critical velocity effects are discussed.
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Work supported by the U.S. Atomic Energy Commission under Contract No. AT(04-3)-34 P.A. 143.
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Johnson, R.T., Kleinberg, R.L., Webb, R.A. et al. Heat flow in superfluid 3He. J Low Temp Phys 18, 501–517 (1975). https://doi.org/10.1007/BF00116140
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DOI: https://doi.org/10.1007/BF00116140