. 2023 Jul 17;127(29):14425–14438. doi: 10.1021/acs.jpcc.3c02264

Table 4. Dynamic Viscosity (Centipoise) and Slip Length (Å) Values for Gas Dynamics.

gas	μ₀	μ_exp^a	μ_dry	Div (%)	L_DGPD	L_CGWPD	L_dry
H₂	0.009	0.009	0.007	–24.4	3.94 ± 1.02	4.29 ± 0.52	41.78
He	0.018	0.020	0.013	–29.2	3.16 ± 0.34	4.24 ± 0.67	54.14
Ar	0.028	0.023	0.021	–1.3	1.24 ± 0.32	1.81 ± 0.35	2.98
CH₄	0.010	0.011	0.004	–5.0	0.65 ± 0.19	0.94 ± 0.45	8.58
CO₂	0.033	0.015	0.014	83.3	0.74 ± 0.13	2.06 ± 0.47	0.65

μ_exp is experimental dynamic viscosity values.^103−107 μ₀ denotes the viscosity of gas from the bulk gas system using the Green–Kubo method. μ_dry is the viscosity of gas in a dry pyrophyllite. L_DGPD denotes the slip length for gas in the DGPD. L_CGWPD denotes the slip length for gas in a CGWPD. L_dry denotes the slip length for gas in the dry pyrophyllite. The symbol Div represents the percent difference between the relative viscosities in the maximum partially saturated gas-filled pore width (μ/μ₀) and in the dry pore width (μ_dry /μ₀) .