Journal ArticleDOI
Model of the evaporating meniscus in a capillary tube
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TLDR
In this paper, a mathematical model describing the evaporating meniscus in a capillary tube has been formulated incorporating the full three-dimensional Young-Laplace equation, Marangoni convection, London-van der Waals dispersion forces, and nonequilibrium interface conditions.Abstract:
A mathematical model describing the evaporating meniscus in a capillary tube has been formulated incorporating the full three-dimensional Young-Laplace equation, Marangoni convection, London-van der Waals dispersion forces, and nonequilibrium interface conditions. The results showed that varying the dimensionless superheat had no apparent effect on the meniscus profile. However, varying the dispersion number produced a noticeable change in the meniscus profile, but only at the microscopic level near the tube wall. No change in the apparent contact angle was observed with changes in the dimensionless superheat or dispersion number. In all cases, the dimensionless mean curvature was asymptotic to a value equal to that for a hemispherical meniscus. The local interfacial mass flux and total mass transfer rate increased dramatically as the dispersion number was increased, suggesting that surface coatings can play an important role in improving or degrading capillary pumping. The model also predicted that the local capillary pressure remains constant and equal to 2{sigma}/r{sub c} regardless of changes in the dimensionless superheat and dispersion number. It should be noted that the results in this study are theoretical in nature and require experimental verification.read more
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Journal ArticleDOI
Characteristics of an evaporating thin film in a microchannel
TL;DR: In this article, an evaporating meniscus in a microchannel is investigated through an augmented Young-Laplace model and the kinetic theory-based expression for mass transport across a liquid-vapor interface.
Journal ArticleDOI
Intermolecular forces in phase-change heat transfer: 1998 Kern award review
TL;DR: In this paper, a review of the literature in this field is presented, along with experimental verification of these interfacial models in this rapidly developing field and a judicious selection of literature gives a consistent set of models of particular use in heat transfer.
Journal ArticleDOI
Investigation of thermocapillary convective patterns and their role in the enhancement of evaporation from pores
Cosimo Buffone,Khellil Sefiane +1 more
TL;DR: In this paper, the evaporation process from a liquid meniscus formed in capillary tubes of various sizes is investigated; a very strong convection within the liquid phase is observed.
Journal ArticleDOI
Experimental investigation of self-induced thermocapillary convection for an evaporating meniscus in capillary tubes using micro-particle image velocimetry
TL;DR: In this article, an experimental investigation of the self-induced liquid convection for an evaporating meniscus in small capillary tubes was performed using a micro-particle image velocimetry (PIV) technique with a vector spatial resolution of 640 nm.
Journal ArticleDOI
Thermal control of electronic equipment by heat pipes
TL;DR: In this paper, a literature survey on the main heat pipe and micro heat pipe technologies developed for thermal control of electronic equipment has been carried out, and the best performances were achieved with Plesch's axially grooved flat miniature heat pipe, which is able to transfer a heat flux of about 60 W·cm−2.
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