Particle dispersion in wake region of obstacles

Tsuneaki Ishima, Koichi Hishida, Masanobu Maeda

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Mechanisms of particle dispersion have been experimentally clarified in wake regions of obstacles. The present experiments have been performed in the wake regions of a pair of circular cylinders and triangular cylinders. Detailed measurements of particle and gas velocities and particle number density are presented using a three-beam laser Doppler velocimeter. Particles of which mean diameter was 42 μm were released into the flow at the center of the gaps between two cylinders and the initial point of the wake region of the triangular cylinders. Particles are affected by the large-scale eddy in the wake region, and particle diffusivity is well correlated with the Stokes number which is defined as the ratio of the particle relaxation time to the characteristic time scale of the turbulence. This result indicates that the mechanism of the interaction between particles and large-scale eddies is independent of flow configuration.

Original languageEnglish
Pages (from-to)857-864
Number of pages8
JournalNippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume60
Issue number571
Publication statusPublished - 1994 Mar
Externally publishedYes

Fingerprint

wakes
Laser Doppler velocimeters
Particle interactions
Circular cylinders
Relaxation time
Turbulence
vortices
laser doppler velocimeters
circular cylinders
Gases
diffusivity
relaxation time
Experiments
turbulence
configurations
gases

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Particle dispersion in wake region of obstacles. / Ishima, Tsuneaki; Hishida, Koichi; Maeda, Masanobu.

In: Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, Vol. 60, No. 571, 03.1994, p. 857-864.

Research output: Contribution to journalArticle

Ishima, Tsuneaki ; Hishida, Koichi ; Maeda, Masanobu. / Particle dispersion in wake region of obstacles. In: Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B. 1994 ; Vol. 60, No. 571. pp. 857-864.
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