Response of the wake of an isolated particle to isotropic turbulent cross-flow

Bagchi, Prosenjit; Balachandar, S.

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https://hdl.handle.net/2142/243 Copy

Description

Title

Response of the wake of an isolated particle to isotropic turbulent cross-flow

Author(s)

• Bagchi, Prosenjit
• Balachandar, S.

Issue Date

2004-03

Abstract

The interaction of an isolated spherical particle with an isotropic turbulent cross-flow is considered using direct numerical simulations (DNS). The particle Reynolds number is varied from about 50 to 600 and the particle diameter is varied from about 1.5 to 10 times the Kolmogorov scale. The Taylor microscale of the freestream turbulent field considered here is 164. The DNS technique employed here is the first of its kind to address particle–turbulence interaction and it resolves the smallest scales in the freestream turbulent flow and the complex vortical structures in the particle wake. The primary objective of this paper is to present new results on the effect of the freestream turbulence on the particle wake and vortex shedding, and the modulation of freestream turbulence in the particle wake. The parameters of the present simulations are comparable to those of the experimental study by Wu and Faeth (1994a, 1994b), and agreement between the present computational results and the experimental measurement are presented. The effect of freestream turbulence on the mean and instantaneous wake structure is studied. ... [more]

Publisher

Department of Theoretical and Applied Mechanics (UIUC)

Series/Report Name or Number

TAM Reports 1047

ISSN

0073-5264

Type of Resource

text

Language

en

Permalink

http://hdl.handle.net/2142/243

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