Measurements and simulations of particle dispersion in a turbulent flow

C. J. Call, I. M. Kennedy

Research output: Contribution to journalArticle

21 Scopus citations

Abstract

A particle imaging technique has been used to collect droplet displacement statistics in a round turbulent jet of air. Droplets are injected on the jet axis, and a laser sheet and position-sensitive photomultiplier tube are used to track their radial displacement and time-of-flight. Dispersion statistics can be computed which are Lagrangian or Eulerian in nature. The experiments have been simulated numerically using a second-order closure scheme for the jet and a stochastic simulation for the particle trajectories. Results are presented for non-vaporizing droplets of sizes from 35 to 160 μm. The simulations have underscored the importance of initial conditions and early droplet displacement history on the droplet trajectory for droplets with large inertia relative to the turbulence. Estimates of initial conditions have been made and their effect on dispersion is quantified.

Original languageEnglish (US)
Pages (from-to)891-903
Number of pages13
JournalInternational Journal of Multiphase Flow
Volume18
Issue number6
DOIs
StatePublished - 1992

Keywords

  • droplets
  • particle dispersion
  • shear flow
  • stochastic simulation

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Mechanical Engineering

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