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Journal Articles Physical Review Letters Year : 2017

Statistical Model for the Orientation of Nonspherical Particles Settling in Turbulence

Abstract

The orientation of small anisotropic particles settling in a turbulent fluid determines some essential properties of the suspension. We show that the orientation distribution of small heavy spheroids settling through turbulence can be accurately predicted by a simple Gaussian statistical model that takes into account particle inertia and provides a quantitative understanding of the orientation distribution on the problem parameters when fluid inertia is negligible. Our results open the way to a parametrization of the distribution of ice crystals in clouds, and potentially lead to an improved understanding of radiation reflection or particle aggregation through collisions in clouds.
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Dates and versions

hal-01675013 , version 1 (08-03-2018)

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K. Gustavsson, J. Jucha, A. Naso, E. Leveque, A. Pumir, et al.. Statistical Model for the Orientation of Nonspherical Particles Settling in Turbulence. Physical Review Letters, 2017, 119 (25), pp.254501. ⟨10.1103/PhysRevLett.119.254501⟩. ⟨hal-01675013⟩
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