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Discrepancies between Viscosity Data for Simple Gases.

H J Hanley, G E Childs

    Science (New York, N.Y.)
    |March 8, 1968
    PubMed
    Summary
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    Discrepancies in dilute gas viscosity coefficients reported by Kestin and Los Alamos National Laboratory suggest existing data may be inaccurate. A reexamination of high-temperature gas viscosity measurements is recommended due to potential errors exceeding 10 percent above 600 K.

    Area of Science:

    • Thermodynamics
    • Fluid Dynamics
    • Physical Chemistry

    Background:

    • Established dilute gas viscosity coefficients have been challenged by recent experimental findings.
    • Kestin and co-workers previously reported values deviating from accepted norms.
    • New data from the Los Alamos Scientific Laboratory corroborates these discrepancies.

    Purpose of the Study:

    • To evaluate the validity of recently reported dilute gas viscosity coefficients.
    • To address the inconsistencies between different experimental measurements of gas viscosity.
    • To highlight the need for a comprehensive review of high-temperature viscosity data.

    Main Methods:

    • Comparative analysis of experimental viscosity data from multiple sources.
    • Examination of Kestin's reported viscosity coefficients.

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  • Inclusion of recent findings from the Los Alamos Scientific Laboratory.

    • Main Results:

    • There is no conclusive evidence to reject the recently reported dilute gas viscosity data.
    • The discrepancies suggest potential inaccuracies in existing accepted values.
    • Published viscosity tables may contain errors up to 10% for temperatures above 600 K.

    Conclusions:

    • The current understanding of dilute gas viscosity at elevated temperatures requires reevaluation.
    • Both experimental methodologies and data correlation techniques for gas viscosity need critical review.
    • High-temperature gas viscosity data, particularly above 600 K, may be unreliable and warrants further investigation.