Experimental Determination of the Viscosity and Density of the Normal Component of SuperfluidHe3at the Melting Curve

Heat flow in superfluid 3He

“…Third, the reduced viscosity is approximately independent of pressure. For comparison we have plotted the data of Alvesalo et al 16 as determined at melting pressure using their vibrating wire viscometer. It is not possible to compare results for the B liquid since they present observations of that phase only below T/T~ = 0.73.…”

Shear viscosity of superfluid 3He–A1 at low temperatures

“…In high magnetic field, strong coupling effect must be considered for maximum gap parameter, and on normal fluid density components of the A 1 and A 2 phases of liquid He wire and torsional-oscillator viscometers [12] and down to T/T c 0.3 by a vibrating-wire viscometer [13]. Experimentally, the shear viscosity of the A phase has been measured by Alvesalo et al [14][15][16] in a vibrating string viscometer experiment and indirectly by Johnson et al [17]. The shear viscosity, in the presence of low magnetic field, has been measured by Alvesalo et al [16].…”

Transport and relaxation properties of superfluid 3He. II. Viscosity, thermal conductivity, and relaxation of the normal fluid density

“…Thus the dependence of the viscosity on the parameter 3.2 drops out. As noted by Pethick et al, 7 the viscosity is given by the usual gas kinetic expression n(T =0) ~ 2 = ~iOnvo~" (17) where iOn ~. ~, 2 t Px (--fp) = m*(pa /37r2) y(T) (18) The scattering of quasiparticles in 3He-B is far from isotropic.…”

“…In the calculation A(T) was approximated by Eq. reduced temperature at melting pressure: our theory (solid curve), vibrating wire data after Alvesalo et al 17 (circles).…”