NDLI: Evaporation in Capillary Tubes of Square Cross Section

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Coquard, Typhaine Camassel, Bruno Prat, Marc
Copyright Year	2005
Abstract	Modeling of evaporation of a pure liquid within a capillary tube of circular cross section is a classic problem which has been the subject of many studies. Here we consider the case of tubes of polygonal cross section. This case leads to much greater evaporation rates owing to the liquid flow along the tube edges induced by the capillary forces. We concentrate on slow evaporation situations for which evaporation is controlled by mass transfer. Various evaporation regimes are distinguished depending on the competition between capillary, gravity and viscous forces. When the capillary forces are dominant, it is shown that the position of the bulk meniscus scales linearly with time (and not as the square root of time as in a capillary tube of circular cross section). The effect of viscous or gravity forces is to thin out the corner liquid fingers as the bulk meniscus recedes into the tube. This contributes to reduce the evaporation rate compared to the capillarity dominated regime. Then the case of faster evaporations inducing significant temperature variations is briefly discussed.
Sponsorship	Heat Transfer Division and Electronic and Photonic Packaging Division
Starting Page	127
Ending Page	134
Page Count	8
File Format	PDF
ISBN	0791847322
DOI	10.1115/HT2005-72452
e-ISBN	0791837629
Volume Number	Heat Transfer: Volume 2
Conference Proceedings	ASME 2005 Summer Heat Transfer Conference collocated with the ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems
Language	English
Publisher Date	2005-07-17
Publisher Place	San Francisco, California, USA
Access Restriction	Subscribed
Subject Keyword	Temperature Gravity (force) Capillarity Evaporation Corners (structural elements) Flow (dynamics) Modeling Mass transfer
Content Type	Text
Resource Type	Article

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