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RESEARCH PAPERS

Drop-Size Distributions of Bingham Liquid (PAINT) Sprays Produced by Fan-Jet Pressure Nozzles

[+] Author and Article Information
W. S. Janna

Mechanical Engineering, The University of New Orleans, New Orleans, La.

J. E. A. John

Dept of Mechanical Engineering, The Ohio State University, Columbus, Ohio

J. Eng. Ind 101(4), 449-455 (Nov 01, 1979) (7 pages) doi:10.1115/1.3439535 History: Online July 15, 2010

Abstract

The drop-size distribution of Bingham liquid sprays was determined by experimentation. Three different highly viscous paints were sprayed with fan-jet airless spray nozzles at pressure ranging from 5 170 to 18 200 kPa. A collection device was constructed to capture a spray sample on microscope slides. Measurement of flattened droplet diameters with a microscope yielded drop-size distribution curves of accumulated volume per cent versus volume median diameter. It was postulated that the wall shear stress existing at the exit plane of the nozzle initiated liquid atomization. A logarithmic correlation was found between shear stress and volume median diameter.

Copyright © 1979 by ASME
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