Hydrodynamic heat flow in very dilute superfluid3He-4He mixtures |
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Authors: | R P Behringer |
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Affiliation: | (1) Department of Physics, Duke University, Durham, North Carolina |
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Abstract: | The superfluid hydrodynamics of heat flow is examined for very small mass concentrationsc of3He in4He in an effort to better understand recent results for the effective heat conductivity eff, which appear to be in conflict with predictions. The full hydrodynamics contains a thermal boundary layer; within this layer the temperature and concentration gradients differ from those in the bulk fluid. An examination of finite heating effects based on the ansatz eff c
–p
for smallc shows distinctly different behavior for experimental determinations of eff whenp<1,p=1, andp>1. Thus, finite heating can be used as a probe to evaluate the exponentp. |
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