Fig. 3: Bounds to thermal diffusivity.
a Thermal diffusivity, Dth = κ/C, of 3He, as a function of temperature. The Fermi liquid regime ( ∝ T −2) is restricted to low temperatures. It is followed by a saturation and a minimum. The curves are plotted using Greywall’s thermal conductivity17 and specific heat26 data. b Thermal diffusivity as a function of temperature in two classical fluids (H2 and 4He in the classical regime)27. In all three cases, Dth has close values at the minimum, as shown by the arrows.
