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Title:Response of the wake of an isolated particle to isotropic turbulent cross-flow
Author(s):Bagchi, Prosenjit; Balachandar, S.
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]
Issue Date:2004-03
Publisher:Department of Theoretical and Applied Mechanics (UIUC)
Series/Report:TAM Reports 1047
Genre:Technical Report
Publication Status:published or submitted for publication
Peer Reviewed:is peer reviewed
Date Available in IDEALS:2007-03-08
Is Version Of:Published as: Prosenjit Bagchi and S. Balachandar. Response of the wake of an isolated particle to isotropic turbulent flow. Journal of Fluid Mechanics, Vol. 518, 2004, pp. 95-123. DOI: 10.1017/S0022112004000989. Copyright 2004 Cambridge University Press. Also available at:

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  • Technical Reports - Theoretical and Applied Mechanics (TAM)
    TAM technical reports include manuscripts intended for publication, theses judged to have general interest, notes prepared for short courses, symposia compiled from outstanding undergraduate projects, and reports prepared for research-sponsoring agencies.

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