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TECHNICAL PAPERS: Evaporation, Boiling, and Condensation

Effect of Ethoxylation and Molecular Weight of Cationic Surfactants on Nucleate Boiling in Aqueous Solutions

[+] Author and Article Information
Juntao Zhang, Raj M. Manglik

Thermal-Fluids and Thermal Processing Laboratory, Department of Mechanical, Industrial and Nuclear Engineering, University of Cincinnati, Cincinnati, OH 45221-0072

J. Heat Transfer 126(1), 34-42 (Mar 10, 2004) (9 pages) doi:10.1115/1.1643755 History: Received June 02, 2003; Revised October 17, 2003; Online March 10, 2004
Copyright © 2004 by ASME
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References

Figures

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The conjugate problem in modeling nucleate boiling of aqueous surfactant solutions
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Schematic of experimental facility: (a) pool boiling apparatus; and (b) cross-sectional view of cylindrical heater assembly.
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Equilibrium and dynamic surface tension measurements for aqueous surfactant solutions at 23°C
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Equilibrium and dynamic surface tension measurements for aqueous surfactant solutions at 80°C
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Dynamic surface tension relaxation for aqueous solutions of CTAB and Ethoquad 18/28 at room temperature (23°C)
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Nucleate pool boiling data for aqueous solutions of CTAB
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Nucleate pool boiling data for aqueous solutions of Ethoquad 18/25
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Variation of the relative heat transfer performance of aqueous cationic surfactant solutions with heat flux and additive concentration (decreasing qw)
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Surface wettability characteristics 10: (a) measured contact angle for aqueous CTAB and Ethoquad 18/25 solutions; and (b) corresponding surfactant adsorption surface state.
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Effect of surfactant molecular weight and its ethoxylation on the heat transfer coefficient enhancement
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Ebullient behavior in nucleate boiling of distilled water, and aqueous CTAB and Ethoquad 18/25 solutions of different concentrations (C/Cc.m.c=0.5, 1, and 2) at qw=20 kW/m2 and 50 kW/m2

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