The viscosity of argon at pressures up to 2000 atmospheres

Influence of Normal and Shear Stress on the Hydraulic Transmissivity of Thin Cracks in a Tight Quartz Sandstone, a Granite, and a Shale

“…Behavior of argon at 10 MPa and 20°C is near to ideal, and compressibility is increased by only 2.9% above that of an ideal gas. The argon gas viscosity as a function of pressure was reported by Michels et al (1954).…”

On the utility of the m-6-8 potential function

“…A potential of interest to us is the 12-6 with a term added to allow for quadrupolequadrupole interactions: $ = $(12-6) + $(quadrupole -quadrupole) (23) Collision integrals for eq (23) have been calculated [97] and were found to be very close to the corresponding collision integrals for the 12-6 alone. [However, the combinations of the collision integrals required for the thermal diffusion factor are significantly different from their equivalents for the .]…”

“…Percentage deviation plot of experimental dilute gas viscosity coefficients of argon compared to theoretical values determined from eq (11) with the m-6-8 potential: m = 11, y = 3.0, a = 3.292 A, e/k = 153 K. Data [13], A [14], n [15], v [16], 0 [19], # [20], [21]; not distinguished [22,23] 32 8. Percentage deviation plot of experimental dilute gas thermial conductivity coefficients for argon compared to eq (14) with the m- [44] .…”

“…The second virial coefficient can also be fitted by itself and we have done this in figure 23 using the parameters m = 12, y = 2.0, a -3.60 A, e/k = 123 K. The corresponding viscosity deviation curve is also shown in figure 23. [98] but it appears that they differ from the corresponding monatomic gas expression by a factor which is very close to unity.…”

On the selection of the intermolecular potential function :

“…• [11] A [17] D [20] A [15] S 1-' ,00, X [21] ® [16] O [19] Deviation curves for argon with the parameter values of Table III. The key for the data is given in Fig.…”