Nanoparticle formation and growth in turbulent flows using the bimodal TEMOM

Tat Leung Chan, Shuyuan Liu, Yan Yue

Research output: Journal article publicationJournal articleAcademic researchpeer-review

12 Citations (Scopus)

Abstract

A developed bimodal Taylor-series expansion method of moments (B-TEMOM) is first coupled with a large eddy simulation (LES) model to investigate nanoparticle formation and subsequent growth due to nucleation, coagulation and condensation processes in turbulent flows. An incompressible gas mixture containing sulfuric acid and water vapor is injected into a stationary flow field with background aerosols. The spatial and temporal particle size distribution (PSD), particle number and mass concentrations, and competition between the formation of primary and secondary particles in turbulent flows are studied. The instantaneous results demonstrate that the large coherent structures strongly affect the particle number and mass concentration distributions as well as particle polydispersity. This finding also verifies that the coherent structures enhance diffusion in the flows and finally increases particle transfer between the two modes of particles. Furthermore, the numerical simulation results obtained by the B-TEMOM are validated with those obtained by the sectional method with excellent agreement.
Original languageEnglish
Pages (from-to)507-517
Number of pages11
JournalPowder Technology
Volume323
DOIs
Publication statusPublished - 1 Jan 2018

Keywords

  • Bimodal Taylor-series expansion method of moments (B-TEMOM)
  • Large eddy simulation
  • Nanoparticle formation and growth
  • Particle size distribution

ASJC Scopus subject areas

  • Chemical Engineering(all)

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