Gravity Controlled Condensation of an Ethanol and Water Mixture on a Horizontal Tube

Tetsu Fujii, Shigeru Koyama, Youichi Simizu, Masaharu Watabe, Yoshiro Nakamura

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    24 Citations (Scopus)


    The experimental results for gravity-controlled condensation of ethanol and water vapor mixtures on a horizontal tube are presented. Dropwise, drop and streak, and ring wise condensations are observed for the ranges of ethanol vapor mass fraction W 1∞ >=0.2∼0.5, 0.5∼0.7 and 0.75∼0.8, respectively, while smooth-film condensation takes place for the ranges of W 1∞ =0∼0.2 and W 1∞ =0.8∼1. Previous theoritical results for the heat transfer coefficent by the present authors based on the two-phase boundary layer theory are valid for the case of smooth-film condensation, while 20 to 60% higher heat transfer coefficient values are obtained for the other cases.

    Original languageEnglish
    Pages (from-to)210-215
    Number of pages6
    JournalTransactions of the Japan Society of Mechanical Engineers Series B
    Issue number509
    Publication statusPublished - Jan 1 1989


    All Science Journal Classification (ASJC) codes

    • Condensed Matter Physics
    • Mechanical Engineering

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