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- W1519553677 abstract "Heat transfer coefficients for total condensation at 750 mm. Hg of saturated, binary vapors have been measured for the four systems n-pentane + n-hexane, methanol + methylene dichloride, n-pentane + methanol, and n-pentane + methylene dichloride. Condensation was entirely filmwise for the first two systems, but was non-filmwise (dropwise in the extreme) for the last two at low temperature differences for solutions dilute in n-pentane. In the non-filmwise cases the heat transfer coefficients are greater than expected for filmwise condensation, but the difference is not nearly as great as occurs for steam condensation. This indicates the existence of a resistance in the vapor film for mixtures, as postulated by Colburn and Drew in 1937. Dropwise condensation of vapor mixtures does not require a promoter, and indicates that interfacial tension forces may not always be neglected in considering the stability of homogeneous condensate films for mixtures.Les coefficients de transfert de chaleur pour la condensation des systemes binaires suivants: n-pentane et n-hexane, methanol et chloromethylene, n-pentane et methanol, n-pentane et chloromethylene a 750 mm Hg ont ete mesures. La condensation se fait sous forme de film pour les deux premiers systemes mais non dans les deux derniers pour des gradients de temperature faibles avec des solutions faibles en n-pentane. Dans les cas ou la condensation n'est pas sous forme de film les coefficients sont plus eleves bien que cette difference soit moindre que celle qui a lieu pour les divers cas de condensation de vapeur d'eau. Ceci est en accord avec l'enonce de Colburn et Drew (1937) quant a l'existence d'une resistance dans le film vapeur pour des melanges. La condensation de melanges sous forme de goutelettes ne requiert pas de promoteur et il semble que la tension interfaciale ne peut pas ětre toujours negligee en considerant la stabilite de films liquides homogenes lors de la condensation." @default.
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- W1519553677 date "1963-04-01" @default.
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- W1519553677 title "A study of the condensation of binary vapors of miscible liquids: Part 2: Heat transfer co-efficients for filmwise and non-filmwise condensation" @default.
- W1519553677 doi "https://doi.org/10.1002/cjce.5450410208" @default.
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