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Condensed Matter > Soft Condensed Matter

arXiv:1909.04644 (cond-mat)
[Submitted on 10 Sep 2019]

Title:Particle Size Effects in Flow-Stabilized Solids

Authors:Scott Lindauer, Carlos P. Ortiz, Robert Riehn, Karen E. Daniels
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Abstract:Flow-stabilized solids are a class of fragile matter that forms when a dense suspension of colloids accumulates against a semi-permeable barrier, for flow rates above a critical value. In order to probe the effect of particle size on the formation of these solids, we perform experiments on micron-sized monodisperse spherical polystyrene spheres in a Hele-Shaw geometry. We examine the spatial extent, internal fluctuations, and fluid permeability of the solids deposited against the barrier, and find that these do not scale with the Péclet number. Instead, we find distinct behaviors at higher Peclet numbers, suggesting a transition from thermal- to athermal-solids which we connect to particle-scale fluctuations in the liquid-like layer at the upstream surface of the solid. We further observe that while the Carman-Kozeny model does not accurately predict the permeability of flow-stabilized solids, we do find a new scaling which predicts the permeability.
Subjects: Soft Condensed Matter (cond-mat.soft); Fluid Dynamics (physics.flu-dyn)
Cite as: arXiv:1909.04644 [cond-mat.soft]
  (or arXiv:1909.04644v1 [cond-mat.soft] for this version)
  https://doi.org/10.48550/arXiv.1909.04644

Submission history

From: Karen E. Daniels [view email]
[v1] Tue, 10 Sep 2019 17:41:04 UTC (4,117 KB)
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