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The Effects of Marangoni Convection on the Rate of Condensation of Pure Water

A series of steady-state water condensation experiments were conducted to determine
the effects of Marangoni convection on the condensation flux. The interface was flat
so that the results of the interfacial temperature discontinuities could be compared to past condensation experiments conducted under similar experimental conditions using a spherical interface. Two experimental methods were used. Method 1 was to vary the temperature in the cooling pipes (Tcp ) with the position of the interface relative to the cooling pipes fixed. Method 2 was to vary the position of the interface while Tcp was held constant. The interfacial temperature discontinuities in this study were approximately 2.3-9 times smaller in magnitude, than those measured using a spherical liquid-vapour interface. The experimental results showed that the condensation flux increased as thermocapillary convection increased (increase in interfacial temperature
gradients and speed). This increase resulted in a 1.37-12.5 times enhancement in the condensation flux of pure water.

Identiferoai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:OTU.1807/33720
Date04 December 2012
CreatorsFernando, Nilendri L.
ContributorsWard, Charles A.
Source SetsLibrary and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada
Languageen_ca
Detected LanguageEnglish
TypeThesis

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