Kinematic viscosity and speed of sound in gaseous CO, CO2, SiF4, SF6, C4F8, and NH3 from 220K to 375K and pressures up to 3.4MPa

High-precision virial coefficients of argon and carbon dioxide from integration of speed of sound data in the pressure–temperature domain

“…On the other hand, the data of EstradaAlexanders and Hurly covers a pressure range that is closer to that limit, hence it becomes easier to calculate the acoustic virial coefficients. Furthermore, the data reported by Estrada-Alexanders and Hurly for u(T, p) using the viscometer is less affected by dissipative processes that occur in CO 2 due to vibrational relaxation of the molecules [45]. This happens because the upper limit of the frequency range of these measurements is about 1 kHz, while for the acoustic resonator it is at least five times larger.…”

“…coefficients of carbon dioxide For the case of carbon dioxide, we combined two sets of speed-of-sound measurements: those made by Estrada-Alexanders and Hurly with a Greenspan viscometer [45] and those reported by EstradaAlexanders and Trusler [26]. We observed that these two sources of information on u(p, T) are compatible in the regions were their samplings overlap.…”

Correlation for the Viscosity of Sulfur Hexafluoride (SF6) from the Triple Point to 1000 K and Pressures to 50 MPa

“…In the case of the secondary data, [12][13][14]21,26,31,34,36,41 show larger overall discrepancies. However, more illustrative are the results shown in the deviation diagram presented in Fig.…”

“…The parameters for this dilute-gas correlation are given in Table 2. The primary data used in the regression were those of Kestin et al, 43 Hoogland et al, 15 Strehlow and Vogel, 37 Hurly et al, 38 Berg, 39,40 and Wilhelm et al 10 As secondary data, selected points from Ueda and Kigoshi, 26 Timrot et al, 13 Abe et al, 31 and Estrada-Alexanders and Hurly 41 were considered. Only low-pressure secondary points outside the temperature range covered by the primary data were used.…”

“…Overall SF 6 Berg 39,40 and those of Estrada-Alexanders and Hurly. 41 The single data point measured by Berg 39,40 in 2005 in a capillary flow instrument designed for high accuracy (0.04%) absolute viscosity in gases was also included in the primary data set. The data of Estrada-Alexanders and Hurly 41 were treated as secondary data, as they have slightly larger uncertainties.…”