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  • Letter

Evidence of collision-induced resuspension of microscopic particles from a monolayer deposit

Amir Banari1,*, Christophe Henry2,†, Rafael Henrique Fank Eidt1, Pierre Lorenz3, Klaus Zimmer3, Uwe Hampel1,4, and Gregory Lecrivain1,‡

  • 1Helmholtz-Zentrum Dresden-Rossendorf, Institut für Fluiddynamik, Bautzner Landstraße 400, 01328 Dresden, Germany
  • 2Inria Sophia Antipolis Méditerranée, 2004 Route des Lucioles, 06902 Valbonne, France
  • 3Leibniz-Institut für Oberflächenmodifizierung, Permoserstraße 15, 04318 Leipzig, Germany
  • 4Technische Universität Dresden, Institut für Energietechnik, Professur für Bildgebende Messverfahren für die Energie- und Verfahrenstechnik, 01069 Dresden, Germany

  • *a.banari@hzdr.de
  • †christophe.henry@inria.fr
  • ‡g.lecrivain@hzdr.de
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Phys. Rev. Fluids 6, L082301 – Published 3 August, 2021

DOI: https://doi.org/10.1103/PhysRevFluids.6.L082301

Abstract

The present Letter addresses the resuspension of microscopic glass particles from a monolayer bed into a turbulent gas flow. With an intermediate surface coverage, here set to about 10% of the field of view, we report two distinct detachment mechanisms. At relatively low flow velocities, few loosely adhering particles move on the wall to eventually collide with neighboring particles resulting in a clustered resuspension. At higher fluid velocities, mostly individual particles resuspend due to their interaction with the turbulent flow. The resuspension curve, showing the remaining particle fraction as a function of the flow velocity, exhibits a strong bimodal character.

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Physics Subject Headings (PhySH)

Corrections

6 August, 2021

Correction: The last sentence of the Abstract contained a production error and has been fixed.

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Phys. Rev. Fluids 6, L082301– Published 3 August, 2021
  • Received 10 February 2021
  • Accepted 20 July 2021
  • Corrected 6 August 2021
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