Experimental study of liquid–vapor phase distribution in a single tube capillary evaporator

Experimental study of liquid–vapor phase distribution in a single tube capillary evaporator An experimental setup was developed to study the vaporization of a liquid inducing capillary pumping. The study was performed on a single square cross-section micro-channel of 500 μm internal edge, heated only on the upper and lower walls to allow visualization through the 2 other faces. The images were obtained by a shadowgraph technique using a digital camera. A program for processing the images was developed to allow the determination of several quantities characterizing the flow, supplemented by information provided by the rest of the instrumentation equipping the experimental device. The results highlight the unstable nature of the phase distribution. Despite these instabilities, films of liquid spread in an averaged manner over a length substantially equal to the length of the zone where the heat flux was applied, independently of the intensity of the heat flux. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experiments in Fluids Springer Journals

Experimental study of liquid–vapor phase distribution in a single tube capillary evaporator

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Publisher
Springer-Verlag
Copyright
Copyright © 2010 by Springer-Verlag
Subject
Engineering; Fluid- and Aerodynamics; Engineering Fluid Dynamics; Engineering Thermodynamics, Heat and Mass Transfer
ISSN
0723-4864
eISSN
1432-1114
D.O.I.
10.1007/s00348-010-0987-9
Publisher site
See Article on Publisher Site

Abstract

An experimental setup was developed to study the vaporization of a liquid inducing capillary pumping. The study was performed on a single square cross-section micro-channel of 500 μm internal edge, heated only on the upper and lower walls to allow visualization through the 2 other faces. The images were obtained by a shadowgraph technique using a digital camera. A program for processing the images was developed to allow the determination of several quantities characterizing the flow, supplemented by information provided by the rest of the instrumentation equipping the experimental device. The results highlight the unstable nature of the phase distribution. Despite these instabilities, films of liquid spread in an averaged manner over a length substantially equal to the length of the zone where the heat flux was applied, independently of the intensity of the heat flux.

Journal

Experiments in FluidsSpringer Journals

Published: Oct 12, 2010

References

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