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Goldfriend T, Diamant H, Witten TA. Screening, Hyperuniformity, and Instability in the Sedimentation of Irregular Objects. Phys Rev Lett. 2017;118(15):158005doi: 10.1103/PhysRevLett.118.158005.
Goldfriend, T., Diamant, H., & Witten, T. A. (2017). Screening, Hyperuniformity, and Instability in the Sedimentation of Irregular Objects. Physical review letters, 118(15), 158005. https://doi.org/10.1103/PhysRevLett.118.158005
Goldfriend, Tomer, et al. "Screening, Hyperuniformity, and Instability in the Sedimentation of Irregular Objects." Physical review letters vol. 118,15 (2017): 158005. doi: https://doi.org/10.1103/PhysRevLett.118.158005
Goldfriend T, Diamant H, Witten TA. Screening, Hyperuniformity, and Instability in the Sedimentation of Irregular Objects. Phys Rev Lett. 2017 Apr 14;118(15):158005. doi: 10.1103/PhysRevLett.118.158005. Epub 2017 Apr 14. PMID: 28452533.
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Phys Rev Lett. 2017 Apr 14;118(15):158005. doi: 10.1103/PhysRevLett.118.158005. Epub 2017 Apr 14.

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

Physical review letters

Tomer Goldfriend, Haim Diamant, Thomas A Witten

Affiliations

  1. Raymond & Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel.
  2. Raymond & Beverly Sackler School of Chemistry, Tel Aviv University, Tel Aviv 69978, Israel.
  3. Department of Physics and James Franck Institute, University of Chicago, Chicago, Illinois 60637, USA.

PMID: 28452533 DOI: 10.1103/PhysRevLett.118.158005

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.

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