Particle dynamics in a turbulent channel flow by lagrangian measurements

Yohei Sato, Itsuro Hayashi, Koichi Hishida

Research output: Contribution to journalArticle

Abstract

Motion of solid particles in a fully-developed channel flow of water was investigated by Lagrangian measurement techniques. Digital particle image velocimetry and a CCD camera mounted on a moving shuttle with mean streamwise velocity of particle were used to detect particle motion and fluid along the particle path simultaneously. Five classes of particles were dispersed in the flow- upstream of the test section. It was observed that a force due to fluid pressure gradient and viscous stresses can be dominant in a particle dynamic equation when particle density ratio was close to unity. Lagrangian velocity spectrum of particle which has the density ratio less than unity was found to be higher than that of fluid along the particle path in the low-wave-number region, which is consistent with theory by Mei (1996). Lagrangian autocorrelation of velocity of both heavier particle and fluid decreased rapidly with increasing values of the particle time constant.

Original languageEnglish
Pages (from-to)701-708
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume64
Issue number619
Publication statusPublished - 1998
Externally publishedYes

Fingerprint

channel flow
Channel flow
Fluids
Flow of water
CCD cameras
Pressure gradient
Autocorrelation
Velocity measurement
unity
fluids
fluid pressure
particle motion
particle image velocimetry
pressure gradients
upstream
time constant
autocorrelation

Keywords

  • DPIV
  • Lagrangian correlation
  • Multiphase flow
  • Particle dynamics
  • Particle frequency response

ASJC Scopus subject areas

  • Mechanical Engineering
  • Condensed Matter Physics

Cite this

Particle dynamics in a turbulent channel flow by lagrangian measurements. / Sato, Yohei; Hayashi, Itsuro; Hishida, Koichi.

In: Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, Vol. 64, No. 619, 1998, p. 701-708.

Research output: Contribution to journalArticle

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