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Atomization and Sprays
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ISSN Print: 1044-5110
ISSN Online: 1936-2684

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Atomization and Sprays

DOI: 10.1615/AtomizSpr.2014008676
pages 431-465

ON THE PRIMARY ATOMIZATION OF NON-NEWTONIAN IMPINGING JETS: VOLUME I EXPERIMENTAL INVESTIGATION

Jennifer Mallory
Western New England University; Maurice J. Zucrow Laboratories, Purdue University, West Lafayette, Indiana 47907, USA
Paul E. Sojka
Maurice J. Zucrow Laboratories (formerly Thermal Sciences and Propulsion Center), School of Mechanical Engineering, Purdue University, West Lafayette, Indiana, 47907-2014, USA

ABSTRACT

The effect of liquid rheology on the flowfield resulting from non-Newtonian impinging jets was investigated experimentally. Experimental data were acquired using a unique facility developed to examine the jet impingement of non-Newtonian liquids. Prior to jet impingement, the rheological properties of hydroxypropylcellulose, Kappa carrageenan, Agar, and several carboxymethylcellulose water-based mixtures were obtained. All investigated mixtures exhibited pseudoplastic behavior. Sheet breakup length and drop size were measured from high-speed video images at various nozzle geometric and flow parameters. Results indicate that viscosity, as a function of shear rate, is not the sole factor that determines atomization likelihood. Instead, a key role is played between the interaction of gelling agent and solvent at the molecular level.


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