On the role of droplet bouncing in modeling impinging sprays under elevated pressures

Zhenyu Zhang, Yicheng Chi, Longji Shang, Peng Zhang, Zhenfeng Zhao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

24 Citations (Scopus)

Abstract

Specifically, a practical while simplified droplet collision model was proposed by modifying the widely-used Estrade et al.’s model to account for the previous experimental observation that hydrocarbon droplets tend to bounce back upon collision at elevated ambient pressures. The KIVA-3V program code implemented with the model was used to simulate the impinging sprays from the previous and the present experiments. The results show that the present model can produce qualitatively satisfactory predictions to the shape, the penetration length, and the Sauter mean diameter (SMD) of the impinging sprays because it accounts for the increased propensity of droplet bouncing at elevated pressures, which however was not considered in any previous models. Due to the limited experimental data on binary droplet collision at elevated pressures, the present model can be treated as a practical approximation for predicting droplet collision outcomes in sprays under high-pressure engine conditions.
Original languageEnglish
Pages (from-to)657-668
Number of pages12
JournalInternational Journal of Heat and Mass Transfer
Volume102
DOIs
Publication statusPublished - 1 Nov 2016

Keywords

  • Bouncing
  • Droplet collision
  • High pressure
  • Impinging sprays
  • KIVA-3V

ASJC Scopus subject areas

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

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