Anomalous velocity fluctuations in particulate turbulent channel flow

Koji Fukagata, Said Zahrai, Shunsuke Kondo, Fritz H. Bark

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Gas-particle turbulent channel flow at Reτ = 644, loaded with copper particles at a mass flow ratio of 2%, is studied numerically by large eddy simulation (LES) coupled with Lagrangian particle tracking (LPT). Inter-particle collisions and correction of drag force in the vicinity of walls are accounted for. Focus is made on the influence of particle wall boundary conditions and their influence on the statistical structure of the flow. It is shown that accordance with experimental data can be improved if a mechanism which can suppress the direct re-entrainment of particles after the impact at the wall is present. Present result shows that inter-particle collisions may play an important role in the re-distribution of particle momentum among different components even at low mass loading conditions.

Original languageEnglish
Pages (from-to)701-719
Number of pages19
JournalInternational Journal of Multiphase Flow
Volume27
Issue number4
DOIs
Publication statusPublished - 2001 Apr
Externally publishedYes

Fingerprint

Large eddy simulation
channel flow
Channel flow
particulates
Drag
Copper
Momentum
Gases
Boundary conditions
particle collisions
mass flow
entrainment
large eddy simulation
drag
boundary conditions
momentum
copper
gases

Keywords

  • Bimodality
  • Gas-particle flow
  • Interparticle collision
  • Lagrangian particle tracking
  • Large eddy simulation
  • Turbulence
  • Two-phase flow

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Mechanical Engineering

Cite this

Anomalous velocity fluctuations in particulate turbulent channel flow. / Fukagata, Koji; Zahrai, Said; Kondo, Shunsuke; Bark, Fritz H.

In: International Journal of Multiphase Flow, Vol. 27, No. 4, 04.2001, p. 701-719.

Research output: Contribution to journalArticle

Fukagata, Koji ; Zahrai, Said ; Kondo, Shunsuke ; Bark, Fritz H. / Anomalous velocity fluctuations in particulate turbulent channel flow. In: International Journal of Multiphase Flow. 2001 ; Vol. 27, No. 4. pp. 701-719.
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