Transport in fluid helium-3 under pressure

The thermal conductivity of liquid helium-3 has been measured at temperatures between 1.3° K and 4.2° K and at pressures up to 55 atm. The viscosity data for liquid helium-3, reported briefly in Ref. 1 are here presented in full for temperatures 1.20° K, 2.00° K, and 3.02° K and at pressures up to 20 atm. Thermal conductivity and viscosity data at 2.00° K are combined with estimated values ofC _vto giveMK/ C _v(whereM is molecular weight,K is thermal conductivity, is viscosity andC _vis the molar specific heat), a dimensionless parameter that is 5/2 in gases at limiting low pressures. Finally, the thermal conductivity of gaseous helium-3 at 1-cm Hg pressure has been measured between 1.3° K and 4° K and compared with available theoretical estimates.