Abstract
Both heat and mass transfer in the gas phase and heat transfer in the liquid phase are examined experimentally for turbulent film condensation of organic binary mixtures flowing downward inside a vertical tube. For an average heat flux, gas-liquid interface temperature and liquid-phase Nusselt number, experimental results are compared with analytical solutions based on stagnant film theory and heat transfer relationships for turbulent film condensation of pure vapors. The experimental results regarding heat transfer agree well with the analytical solutions, except that the liquid phase Nusselt number for ethanol and water mixtures is far higher for the experimental results than predicted by the analytical solutions. This high liquid phase Nusselt number is considered to be caused by dropwise condensation in the liquid phase. © 1997 Scripta Technica, Inc. Heat Trans Jpn Res, 25(6): 362–381, 1996
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