Splashing characteristics of monodisperse sprays with significant viscosity differences impacting a flat surface

H. Hwang, Dong J. Lee, Suk Goo Yoon, Ho Young Kim, Scott C. James

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Drop impingement and splashing as a function of viscosity and, to a lesser extent, temperature are examined here. The working fluid is a mixture of water and glycerin with relative mass percentages varying from 0 to 100%, which spans a viscosity range of three orders of magnitude. First, a criterion that separates "on" and "off" for splashing as a function of glycerin percentage is expressed in terms of both Weber and Reynolds numbers and its highly nonlinear behavior is a function of the change in fluid viscosity. Next, the complex splashing characteristics of a rather simple monodisperse spray injected at a pressure of 2 bars onto a flat, 2-mm-diameter aluminum cylindrical rod are examined. Spatial variations in the fraction of splashed liquid, Sauter mean diameter, splashed droplet size distribution, and splash volume fraction as a function of radial distance for these mixtures are reported.

Original languageEnglish
Pages (from-to)1321-1330
Number of pages10
JournalDrying Technology
Volume28
Issue number12
DOIs
Publication statusPublished - 2010 Dec 1

Keywords

  • Dissipation energy
  • Glycerin viscosity
  • Splash criteria
  • Spray coating

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Physical and Theoretical Chemistry

Fingerprint Dive into the research topics of 'Splashing characteristics of monodisperse sprays with significant viscosity differences impacting a flat surface'. Together they form a unique fingerprint.

  • Cite this