Interfacial phenomena and ebullient dynamics in saturated nucleate pool boiling of aqueous solutions of three surfactants that have different molecular weight and ionic nature are experimentally investigated. The additive molecular mobility at interfaces manifests in a dynamic surface tension behavior (surfactant adsorption–desorption at the liquid–vapor interface), and varying surface wetting (contact angle) with concentration (surfactant physisorption at the solid–liquid interface). This tends to change, enhance, and control the boiling behavior significantly, and an optimum heat transfer enhancement is obtained in solutions at or near the critical micelle concentration (CMC) of the surfactant. Furthermore, wettability (contact angle) is observed to be a function of the molecular makeup of the reagent, and shows distinct regions of change along the adsorption isotherm that are associated with the aggregation mode of adsorbed ions at the solid–water interface. This distinguishably alters the ebullience from not only that in pure water, but also between pre- and post-CMC solutions. Increased wetting tends to suppress nucleation and bubble growth, thereby weakening the boiling process.
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e-mail: Raj.Manglik@uc.edu
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Research Papers
Additive Adsorption and Interfacial Characteristics of Nucleate Pool Boiling in Aqueous Surfactant Solutions
Juntao Zhang,
Juntao Zhang
Thermal-Fluids and Thermal Processing Laboratory, Department of Mechanical, Industrial and Nuclear Engineering,
University of Cincinnati
, Cincinnati, OH 45221-0072
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Raj M. Manglik
Raj M. Manglik
ASME Fellow (513) 556-5704
(513) 556-3390
Thermal-Fluids and Thermal Processing Laboratory, Department of Mechanical, Industrial and Nuclear Engineering,
e-mail: Raj.Manglik@uc.edu
University of Cincinnati
, Cincinnati, OH 45221-0072
Search for other works by this author on:
Juntao Zhang
Thermal-Fluids and Thermal Processing Laboratory, Department of Mechanical, Industrial and Nuclear Engineering,
University of Cincinnati
, Cincinnati, OH 45221-0072
Raj M. Manglik
ASME Fellow (513) 556-5704
(513) 556-3390
Thermal-Fluids and Thermal Processing Laboratory, Department of Mechanical, Industrial and Nuclear Engineering,
University of Cincinnati
, Cincinnati, OH 45221-0072e-mail: Raj.Manglik@uc.edu
J. Heat Transfer. Jul 2005, 127(7): 684-691 (8 pages)
Published Online: January 10, 2005
Article history
Received:
May 4, 2004
Revised:
January 10, 2005
Citation
Zhang, J., and Manglik, R. M. (January 10, 2005). "Additive Adsorption and Interfacial Characteristics of Nucleate Pool Boiling in Aqueous Surfactant Solutions." ASME. J. Heat Transfer. July 2005; 127(7): 684–691. https://doi.org/10.1115/1.1924626
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