Viscosity of Gases at Atmospheric Pressure

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Other Title
  • 常圧における気体粘度の推算式

Description

The well-known Licht-Stechert's viscosity formula1) gives big errors when it is applied to organic gases at temperature above 100°C or to gases which exhibit association effect, of which a report was made in the author's former paper? (Table 5) Neither can the Hirschfelder's formula2) be available for organic gases at above 130°C or for gases which exhibit large association effect. (Table 5) The Uyehara-Watson method3)4) also fails to be effective for the organic gases at above 130°C (Table 5). The author obtained several viscosity formulae which held good for organic gases. It was, however, difficult to find a single formula for all the organic gases, which, therefore, were classified into two groups, B and C. Several formulae (A-C2) respectively suitable for each group in the temperature ranges of 0-100°C, 100-300°C, and 300-600°C were derived.<BR>Uses of these formulae are shown in Table 2.<BR>The errors of these formulae are less than 4.5% (in many cases, <3%)<BR>The best method to get viscosities of C group gases at above 100°C is as follows. μ100 (the viscosity at 100°C) was obtained by the application of Uyehara-Watson method, and using the μ100 values, the viscosities at above 100°C were calculated by means of the author's formulae B1 and C2.

Journal

  • Chemical engineering

    Chemical engineering 19 (7), 342-348, 1955

    The Society of Chemical Engineers, Japan

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