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  • A Capillary Tube Viscometer Designed for Measurements of Hydrogen Gas Viscosity at High Pressure and High Temperature

    Author(s)
    Yusibani, Elin
    Nagahama, Yosuke
    Kohno, Masamichi
    Takata, Yasuyuki
    Woodfield, Peter L
    Shinzato, Kanei
    Fujii, Motoo
    Griffith University Author(s)
    Woodfield, Peter L.
    Year published
    2011
    Metadata
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    Abstract
    A capillary tube viscometer was developed to measure the dynamic viscosity of gases for high pressure and high temperature. The apparatus is simple and designed for safe-handling operation. The gas was supplied to the capillary tube from a high-pressure reservoir tank through a pressure regulator unit to maintain a steady state flow. The measurements of a pressure drop across the capillary tube with high accuracy under extreme conditions are the main challenge for this method. A differential pressure sensor for high pressures up to 100MPa is not available commercially. Therefore, a pair of accurate absolute pressure ...
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    A capillary tube viscometer was developed to measure the dynamic viscosity of gases for high pressure and high temperature. The apparatus is simple and designed for safe-handling operation. The gas was supplied to the capillary tube from a high-pressure reservoir tank through a pressure regulator unit to maintain a steady state flow. The measurements of a pressure drop across the capillary tube with high accuracy under extreme conditions are the main challenge for this method. A differential pressure sensor for high pressures up to 100MPa is not available commercially. Therefore, a pair of accurate absolute pressure transducers was used as a differential pressure sensor. Then the pressure drop was calculated by subtracting the outlet pressure from the inlet one with a resolution of 100Pa at 100MPa. The accuracy of the present measurement system is confirmed by measuring the viscosity of nitrogen as a reference gas. The apparatus provided viscosities of nitrogen from ambient temperature to 500K and hydrogen from ambient temperature to 400K and for pressures up to 100MPa with a maximum deviation of 2.2% compared with a correlation developed by the present authors and with REFPROP (NIST).
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    Journal Title
    International Journal of Thermophysics
    Volume
    32
    Issue
    6
    DOI
    https://doi.org/10.1007/s10765-011-0999-6
    Subject
    Mechanical Engineering not elsewhere classified
    Classical Physics
    Physical Chemistry (incl. Structural)
    Chemical Engineering
    Publication URI
    http://hdl.handle.net/10072/42660
    Collection
    • Journal articles

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