Fluid Mechanics and Transport Phenomena

The effects of particle size on the mechanisms of atomization of suspensions using hydraulic spray nozzles

  1. F. O. Addo-Yobo1,*,
  2. M. J. Pitt2,
  3. H. A. Obiri3

Article first published online: 8 NOV 2010

DOI: 10.1002/aic.12441

Issue

AIChE Journal

AIChE Journal

Volume 57, Issue 8, pages 2007–2024, August 2011

Additional Information

How to Cite

Addo-Yobo, F. O., Pitt, M. J. and Obiri, H. A. (2011), The effects of particle size on the mechanisms of atomization of suspensions using hydraulic spray nozzles. AIChE J., 57: 2007–2024. doi: 10.1002/aic.12441

Author Information

  1. 1

    Research and Innovation Centre, Accra Polytechnic, P.O. Box GP 561, Barnes Rd, Accra, Ghana

  2. 2

    Dept. of Chemical and Biological Engineering, Sheffield University, Beech Hill Rd. Norton, Sheffield S10 2, U.K.

  3. 3

    The Institute of Industrial Research, CSIR, P.O. Box LG576, Legon, Accra, Ghana

*Research and Innovation Centre, Accra Polytechnic, P.O. Box GP 561, Barnes Rd, Accra, Ghana

Publication History

  1. Issue published online: 12 JUL 2011
  2. Article first published online: 8 NOV 2010
  3. Accepted manuscript online: 24 SEP 2010 10:04AM EST
  4. Manuscript Revised: 29 AUG 2010
  5. Manuscript Received: 12 JUL 2008

SEARCH

SEARCH BY CITATION

ARTICLE TOOLS

View Full Article (HTML) Get PDF (991K)

Keywords:

  • atomization;
  • suspensions;
  • liquid sheet disintegration;
  • particles;
  • critical perforation number

Abstract

A study of the effects of particles on the manner in which sheets of aqueous suspensions wetted particles disintegrate during atomization by hydraulic pressure nozzle showed that the sheet stability is reduced by particles in the region where the particle size is greater than the sheet thickness due to localized thinning of the sheet due to curvature variations caused by particles moving apart in this region. At high-volume fraction of solids, the sheets perforate. It is inferred from the mechanism that the critical volume fraction of solids at the onset of perforation decreases with decreasing particle size, decreasing density and surface tension, and increasing viscosity of the medium. A critical perforation number, Ac, is inferred from the above mechanism. Waves are observed on the sheet at positions closer to the nozzle which would be absent on aqueous sheets similarly produced but free of particles. © 2010 American Institute of Chemical Engineers AIChE J, 2011

View Full Article (HTML) Get PDF (991K)