Numerical investigation of droplet pre-dispersion in a monodisperse droplet spray dryer

Jie Xiao, Yang Li, Oluwafemi Ayodele George, Zhihao Li, Shujun Yang, Meng Wai Woo, Winston Duo Wu, Xiao Dong Chen

Research output: Contribution to journalArticleResearchpeer-review

10 Citations (Scopus)

Abstract

Monodisperse droplet spray dryers have great advantages in particle formation through spray drying because of their ability to produce uniform sized particles. Experimental analyses of this system have shown that droplets atomized through the piezoceramic nozzle need to be sufficiently well dispersed before entering the drying chamber to achieve sufficiently dried particles. However, the dispersion dynamics cannot be readily observed because of experimental limitations, and key factors influencing the dispersion state currently remain unclear. This study carried out numerical simulations for droplet dispersions in the dispersion chamber, which allow this important process to be visualized. The systematic and quantitative analyses on the dispersion states provide valuable data for improving the design of the dispersion chamber, and optimizing the spray drying operation.

Original languageEnglish
Pages (from-to)44-60
Number of pages17
JournalParticuology
Volume38
DOIs
Publication statusPublished - 1 Jun 2018

Keywords

  • CFD simulation
  • Discrete phase model (DPM)
  • Droplet dispersion
  • Monodisperse droplet spray dryer
  • Reaction engineering approach (REA)
  • Spray drying

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