Heat transfer and fluid dynamics during the collision of a liquid droplet on a substrate - II. Experiments

Z. Zhao, D. Poulikakos, J. Fukai

Research output: Contribution to journalArticlepeer-review

78 Citations (Scopus)

Abstract

This paper presents an experimental study of liquid droplet impingement upon a substrate. Qualitative as well as quantitative comparisons were conducted between the experimental measurements and the numerical predictions from the theoretical model in part 1 of this paper. The droplet deformation process was visualized using a two-reference-beam pulse holography method. Measurements of the transient splat radius were performed with a novel photoelectric technique. The experimentally obtained droplet shapes were similar to the numerically predicted ones for the same conditions. The impact dynamics was characterized by droplet spreading, recoiling and oscillations. The spreading and recoiling motions depended upon the initial velocity as well as the droplet properties. In summary, the theoretical predictions agreed well with the experimental results until the late stages of the droplet spreading process.

Original languageEnglish
Pages (from-to)2791-2802
Number of pages12
JournalInternational Journal of Heat and Mass Transfer
Volume39
Issue number13
DOIs
Publication statusPublished - Sep 1996

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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