TY - JOUR
T1 - Gravity Controlled Condensation of an Ethanol and Water Mixture on a Horizontal Tube
AU - Fujii, Tetsu
AU - Koyama, Shigeru
AU - Simizu, Youichi
AU - Watabe, Masaharu
AU - Nakamura, Yoshiro
PY - 1989
Y1 - 1989
N2 - 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 W1∞>=0.2∼0.5, 0.5∼0.7 and 0.75∼0.8, respectively, while smooth-film condensation takes place for the ranges of W1∞=0∼0.2 and W1∞=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.
AB - 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 W1∞>=0.2∼0.5, 0.5∼0.7 and 0.75∼0.8, respectively, while smooth-film condensation takes place for the ranges of W1∞=0∼0.2 and W1∞=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.
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U2 - 10.1299/kikaib.55.210
DO - 10.1299/kikaib.55.210
M3 - Article
AN - SCOPUS:0024482053
SN - 0387-5016
VL - 55
SP - 210
EP - 215
JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
IS - 509
ER -