Measurements of the Viscosity of Krypton

Abstract

The viscosity. of krypton has be~n m.easured over the temperature range 297° to 666°K by the oscillating disk method usmg helium for calibration. The viscosities obtained were used to get the parameters for a Lennard-Jones 12-6 potential function and they were found to be o/k= 162°K and u=3.734 A. Calculation of the viscosity, thermal conductivity, self-diffusion coefficient, second virial coefficients in the moderate temper~ture ran?e, and the heat of sublimation at OOK from the L. J. 12-6 function gives very good agreement with expen~ent~l values. Calculated v~lues for the second virial coefficient at low temperatures, the reduced thermal dIffusIOn factor, and the lattice spacing at OOK are in fair agreement with experiment.

Critical reassessment of viscosities of 11 common gases

“…Figure 1 shows that the good agreement between different workers for nitrogen lends support to the selection of nitrogen as a standard gas in viscosity measurements (34). For krypton, the good agreement of most workers in the temperature range 293-700K (Figure 5) would suggest that the results of Clifton (10) and Nasini and Rossi (48) are in error.…”

Intermolecular potentials and viscosities of some polar organic vapours

“…To calculate the viscosity from the damping we followed the procedure of Clifton (1963), according to which the viscosity may be written as where A, Xo, 7 and TO are the logarithmic decrements and periods of oscillation in the gas and in Vacuo respectively and C is a constant of the apparatus. Clifton (1963) has discussed in detail the validity of equation ( 1) at low densities, so it is not necessary to use the more complicated equations derived by Newel1 (1959). The values of &/TO were found to increase from 1-50 x 10-4 at 30"c to 1.85 x 10-4 at 204"c.…”

Viscosity of monatomic gases at temperatures up to 5000–6000°K

“…It was found in the 1960s in [5,7] that the initlal hlgh-temperature data on the viscosity of the gases [1][2][3][4] was in error: it was lower than the results of newer studies and the error increased with an increase in temperature-reaching 10% for argon at 2000~ for example.…”