TECHNICAL PAPERS: Evaporation, Boiling, and Condensation

Binary Fluid Mixture and Thermocapillary Effects on the Wetting Characteristics of a Heated Curved Meniscus

[+] Author and Article Information
David M. Pratt

United States Air Force, Wright-Patterson AFB, OH 45433-7542

Kenneth D. Kihm

Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843-3123

J. Heat Transfer 125(5), 867-874 (Sep 23, 2003) (8 pages) doi:10.1115/1.1599372 History: Received November 22, 2002; Revised May 16, 2003; Online September 23, 2003
Copyright © 2003 by ASME
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Liquid-vapor interface of a binary mixture working fluid with heated pore wall
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Binary mixture meniscus inside a capillary tube with an induced temperature gradient by wall heating and a concentration gradient by distillation of a more volatile working fluid
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Schematic of the single pore capillary pumped loop
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Experimental setup of the single pore evaporator capillary pumped loop (CPL) placed in a vacuum chamber
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Capillary pumping potential versus wall temperature gradient: (a) Pure pentane, (b) 3% decane, (c) 5% decane, and (d) 10% decane in volume in the mixture with pentane.  
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Capillary pumping potential versus wall temperature gradient for decane concentrations: (a) condenser temperature at 5°C, (b) 15°C, and (c) 25°C.
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Contact angle versus liquid temperature for pure pentane and pure decane
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Capillary pumping potential versus wall temperature gradient
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Heat transferred into the meniscus versus total heat input for a fixed condenser temperature of 25°C
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Energy balance at the meniscus to estimate the amount of heat transfer into the meniscus
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Temperature at the meniscus versus input power-condenser temperature is 25°C



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