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Atomization and Sprays

Journal of the International Institutes for Liquid Atomization and Spray Systems

ISSN for PRINT: 1045-5110

Institutional price:	$787.00
Issues per year:	8

Best Paper Award Selection - Editorial Board Site

1993, Volume3

126 pages

Issue price - $75.00

EFFERVESCENT ATOMIZATION OF HIGH-VISCOSITY FLUIDS: PART II. NON-NEWTONIAN LIQUIDS

Harry N. Buckner
Thermal Sciences and Propulsion Center, School of Mechanical Engineering, Purdue University, West Lafayette, Indiana 47907

Paul E. Sojka
Maurice J. Zucrow Laboratories (formerly Thermal Sciences and Propulsion Center), School of Mechanical Engineering, Purdue University, West Lafayette, Indiana, USA

ABSTRACT

Previous Newtonian effervescent atomization work is extended to non-Newtonian fluids, with the influence of non-Newtonian fluid rheology being of particular interest. Mean drop size data obtained during this study show no dependence on either non-Newtonian flow behavior index or consistency index, as they varied from 0.85 to 0.95 and 400 to 968 cP sⁿ⁻¹, respectively. An increase in mean drop size relative to a Newtonian fluid with equal apparent viscosity was observed, however, upon addition of polymer. This phenomena is attributed to the yield stress associated with polymeric fluids. These observations suggest that primary atomization is unimportant during effervescent spray formation and that secondary atomization is the controlling factor.