Mj. Assael et al., MEASUREMENTS OF THE VISCOSITY OF R134A AND R32 IN THE TEMPERATURE-RANGE 270-340-K AT PRESSURES UP TO 20-MPA, International journal of thermophysics, 15(4), 1994, pp. 591-601
This paper reports new measurements of the liquid viscosity of R134a a
nd R32 in the temperature range 270 to 340 K and pressures up to 20 MP
a. The measurements have been carried out in a vibrating-wire instrume
nt calibrated with respect to the standard reference value of the visc
osity of water. It is estimated that the uncertainty of the present vi
scosity data is one of 0.5%. The experimental data have been represent
ed by polynomial functions of temperature and pressure for the purpose
s of interpolation.