Screening, Hyperuniformity, and Instability in the Sedimentation of Irregular Objects

Tomer Goldfriend; Haim Diamant; Thomas A. Witten

doi:https://doi.org/10.1103/PhysRevLett.118.158005

Screening, Hyperuniformity, and Instability in the Sedimentation of Irregular Objects

Tomer Goldfriend, Haim Diamant, Thomas A. Witten

Research output: Contribution to journal › Article › peer-review

Abstract

We study the overdamped sedimentation of non-Brownian objects of irregular shape using fluctuating hydrodynamics. The anisotropic response of the objects to flow, caused by their tendency to align with gravity, directly suppresses concentration and velocity fluctuations. This allows the suspension to avoid the anomalous fluctuations predicted for suspensions of symmetric spheroids. The suppression of concentration fluctuations leads to a correlated, hyperuniform structure. For certain object shapes, the anisotropic response may act in the opposite direction, destabilizing uniform sedimentation.

Original language	English
Article number	158005
Journal	Physical Review Letters
Volume	118
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevLett.118.158005
State	Published - 14 Apr 2017
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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https://doi.org/10.1103/PhysRevLett.118.158005

Cite this

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Screening, Hyperuniformity, and Instability in the Sedimentation of Irregular Objects

Abstract

All Science Journal Classification (ASJC) codes

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