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An Experimental Investigation of Nucleate Pool Boiling in Aqueous Solutions of a Polymer by A. D. Athavale; R. M. Manglik; M. A. Jog is a Engineering article available to read on EtoBox.

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## Abstract Nucleate boiling characteristics of aqueous solutions of hydroxyl ethyl cellulose (HEC QP‐300; __M__ ∼ 600 kg/mol) in different concentrations (1.0 × 10^−9^ ≤ __C__ ≤ 4.0 × 10^−9^ mol/cc) are reported. These are viscous non‐Newtonian, shear‐thinning solutions that also display interfacial tension relaxation, which has both a concentration‐dependent and temporal behavior; surface wetting increases as well, as measured by the reduction of contact angle. The measured pool boiling heat transfer from an electrically heated horizontal cylinder in __C__ = 1.0 × 10^−9^ mol/cc aqueous solution is found to be enhanced by ∼20% over the entire heat flux range (4.0 < __q__ < 200 kW/m^2^). In higher concentration solutions, however, heat transfer degrades at low heat fluxes (incipience and partial boiling) with subsequent enhancement (∼45% maximum) at high heat fluxes or in the fully‐developed nucleate boiling regime. This anomalous boiling behavior in the two regimes, characterized by respectively different ebullience signatures, is shown to be scaled with changes in the liquid‐solid interface wetting, vapor‐liquid interfacial tension, and shear‐thinning viscosity of the polymeric s

Who reads An Experimental Investigation of Nucleate Pool Boiling in Aqueous Solutions of a Polymer?

Author

A. D. Athavale; R. M. Manglik; M. A. Jog

Publisher

American Institute of Chemical Engineers; Wiley (John Wiley & Sons); Wiley-Blackwell; Wiley (ISSN 0001-1541)

Published

2011

Language

EN

Field

Engineering (Physical Sciences)