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Article Dans Une Revue Physical Review E Année : 2020

Transition from clogging to continuous flow in constricted particle suspensions

Résumé

When suspended particles are pushed by liquid flow through a constricted channel, they might either pass the bottleneck without trouble or encounter a permanent clog that will stop them forever. However, they may also flow intermittently with great sensitivity to the neck-to-particle size ratio D/d. In this Rapid Communication, we experimentally explore the limits of the intermittent regime for a dense suspension through a single bottleneck as a function of this parameter. To this end, we make use of high time- and space-resolution experiments to obtain the distributions of arrest times (T ) between successive bursts, which display power-law tails (∝T^−α) with characteristic exponents. These exponents compare well with the ones found for as disparate situations as the evacuation of pedestrians from a room, the entry of a flock of sheep into a shed, or the discharge of particles from a silo. Nevertheless, the intrinsic properties of our system (i.e., channel geometry, driving and interaction forces, particle size distribution) seem to introduce a sharp transition from a clogged state (α < 2) to a continuous flow, where clogs do not develop at all. This contrasts with the results obtained in other systems where intermittent flow, with power-law exponents above two, were obtained.
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Dates et versions

hal-04166306 , version 1 (21-07-2023)

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Mathieu Souzy, Iker Zuriguel, Alvaro Marin. Transition from clogging to continuous flow in constricted particle suspensions. Physical Review E , 2020, 101 (6), pp.060901. ⟨10.1103/PhysRevE.101.060901⟩. ⟨hal-04166306⟩
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