Correlation of the zero-density viscosity of polyatomic gases

✍ Scribed by G. C. Maitland; R. D. Trengove; W. A. Wakeham

• Publisher: Springer
• Year: 1986
• Tongue: English
• Weight: 403 KB
• Volume: 7
• Category: Article
• ISSN: 0195-928X
• DOI: 10.1007/bf00502389

✦ Synopsis

Correlations are presented for the dilute-gas viscosities of three gases with multipole moments of increasing order: carbon dioxide (quadrupolar), methane (octopolar), and sulfur hexafluoride (hexadecapolar). These are based on highquality experimental data and are estimated to have an uncertainty of +0.3% near room temperature, rising to _+ 1.5 % at the extremes of temperature considered (~200 to ~ 1000 K). A comparison of these correlations with the twoparameter corresponding-states correlation developed by Kestin and co-workers for monatomie systems indicates systematic deviations, particularly at low temperatures. Model calculations designed to investigate the influence of a quadrupole term in the intermolecular pair potential on the viscosity coefficient indicate that these systematic deviations can be ascribed to such long-range multipolar interactions and suggest the basis for a new, more general threeparameter corresponding-states procedure.