Effect of particle residence time on particle dispersion in a plane mixing layer

Tsuneaki Ishima, Koichi Hishida, Masanobu Maeda

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38 Citations (Scopus)


A particle dispersion has been experimentally investigated in a two-dimensional mixing layer with a large relative velocity between particle and gas-phase in order to clarify the effect of particle residence time on particle dispersion. Spherical glass particles 42, 72, and 135 µm in diameter were loaded directly into the origin of the shear layer. Particle number density and the velocities of both particle and gas phase were measured by a laser Doppler velocimeter with modified signal processing for two-phase flow. The results confirmed that the characteristic time scale of the coherent eddy apparently became equivalent to a shorter characteristic time scale due to a less residence time. The particle dispersion coefficients were well correlated to the extended Stokes number defined as the ratio of the particle relaxation time to the substantial eddy characteristic time scale which was evaluated by taking account of the particle residence time.

Original languageEnglish
Pages (from-to)751-759
Number of pages9
JournalJournal of Fluids Engineering, Transactions of the ASME
Issue number4
Publication statusPublished - 1993 Dec

ASJC Scopus subject areas

  • Mechanical Engineering


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