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  • Letter
  • Open Access

Two regimes of dilute turbulent settling suspensions under shear

Jake Langham* and Andrew J. Hogg

  • *Contact author: j.langham@bristol.ac.uk
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Phys. Rev. Fluids 9, L062602 – Published 10 June, 2024

DOI: https://doi.org/10.1103/PhysRevFluids.9.L062602

Abstract

When turbulent flow is laden with negatively buoyant particles, their mean distribution in the direction of gravity can induce stable density gradients that penalize turbulent fluctuations. This effect is studied numerically for shear-driven flow with dilute noninertial sediment. The turbulent dynamics and sediment transport depend critically on particle settling velocity vs, splitting into two regimes: homogeneous weakly stratified turbulence and flow with developed turbulence atop an intermittent boundary layer. At intermediate vs, neither state can be sustained and the flow laminarizes.

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Phys. Rev. Fluids 9, L062602– Published 10 June, 2024
  • Received 13 October 2023
  • Accepted 28 May 2024
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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