Clogging in constricted suspension flows

Marin, Alvaro; Lhuissier, Henri; Rossi, Massimiliano; Kähler, Christian J.

doi:10.1103/physreve.97.021102

Cited by 66 publications

(88 citation statements)

References 26 publications

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“…Clogging for a geometric ratio N G = 4 (Figure 3, top left) exceeds previously reported thresholds from singlepore constriction experiments with spherical particles that showed stable bridge formation when N G < 3 (Marin et al, 2018;Valdes & Santamarina, 2006). This result hints to stabilizing electrostatic effects when small micron-scale particles are involved.…”

Section: Glass Particlessupporting

confidence: 68%

“…The resulting particle-level forces include the buoyant weight, inertia, drag, and particle-wall interaction forces. Interaction forces and the constriction-toparticle size ratio d c /d play a central role in clogging (Marin et al, 2018;Sakthivadivel & Einstein, 1970;Sherard et al, 1984;Valdes & Santamarina, 2008). In the extreme case of d c /d➔1.0, large particles or large particle aggregations cause clogging by sieving (Dersoir et al, 2015;Dersoir et al, 2017;Sauret et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Particle Migration and Clogging in Porous Media: A Convergent Flow Microfluidics Study

Zhao

Santamarina

2019

JGR Solid Earth

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The migration and retention of fine particles in porous media are important phenomena in natural processes and engineering applications. Migrating particles experience physicochemical interactions with carrier fluids, pore walls, and other migrating particles. The governing dimensionless ratios capture particle‐level forces, flow conditions, and geometric characteristics. This study explores micron‐size particle migration and retention in microfluidic chips during convergent radial flow, which is the prevalent flow condition in water extraction and oil production. Pore‐scale observations reveal the role of electrostatic interactions on clogging mechanisms: Glass particles experience retardation‐accumulation bridging, while quasi‐buoyant latex particles involve capture and clogging. Consequently, flow rates exert opposite effects on the clogging behavior of inertial glass particles versus electrostatically affected latex particles. Migrating particles experience a varying fluid velocity field in convergent radial flow, and clogging reflects the evolving local conditions (Nad, Ar, Stk, and Re). In particular, clogged pores alter local flow and promote further clogging nearby. Pore network model simulations suggest that such “dependent clogging” lowers the permeability of the porous medium more effectively than independent clogging at random locations.

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Section: Glass Particlessupporting

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Particle Migration and Clogging in Porous Media: A Convergent Flow Microfluidics Study

Zhao

Santamarina

2019

JGR Solid Earth

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“…The clogging of a microchannel follows three possible mechanisms depending on the size of the particles, their surface chemistry or charge and the concentration of the suspension [19]. For dense suspensions of particles without surface charges, bridging, i.e., the formation of an arch of particles is the main clogging mechanism [20][21][22][23][24][25][26][27]. This situation is similar to what is observed at a silo outlet with dry granular material [28].…”

Section: Introductionmentioning

confidence: 60%

Growth of clogs in parallel microchannels

Sauret

Somszor²,

Villermaux

et al. 2018

Phys. Rev. Fluids

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During the transport of colloidal suspensions in microchannels, the deposition of particles can lead to the formation of clogs, typically at constrictions. Once a clog is formed in a microchannel, advected particles form an aggregate upstream from the site of the blockage. This aggregate grows over time, which leads to a dramatic reduction of the flow rate. In this paper, we present a model that predicts the growth of the aggregate formed upon clogging of a microchannel. We develop an analytical description that captures the time evolution of the volume of the aggregate, as confirmed by experiments performed using a pressure-driven suspension flow in a microfluidic device. We show that the growth of the aggregate increases the hydraulic resistance in the channel and leads to a drop in the flow rate of the suspensions. We then derive a model for the growth of aggregates in multiple parallel microchannels where the clogging events are described using a stochastic approach. The aggregate growths in the different channels are coupled. Our work illustrates the critical influence of clogging events on the evolution of the flow rate in microchannels. The coupled dynamics of the aggregates described here for parallel channels is key to bridge clogging at the pore scale with macroscopic observations of the flow rate evolution at the filter scale.

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“…In active systems, clogs might be shattered by the internal energy of the particles, then leading to an intermittent flow as in the case of active grains [1], sheep flocks [2], or pedestrian crowds [3,4]. This intermittency can also be found in systems of passive elements such as microparticles [5][6][7][8], droplets [9,10], or even granular matter [11], where external perturbations (such as pressure gradients or vibrations) trigger the recovery of the flow. Nevertheless, for the case of inert grains in a silo, if no external perturbation is applied, a clogging arch would persist forever [12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Effect of hopper angle on granular clogging

López-Rodríguez

Gella

et al. 2019

Phys. Rev. E

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We present experimental results of the effect of the hopper angle on the clogging of grains discharged from a two-dimensional silo under gravity action. We observe that the probability of clogging can be reduced by three orders of magnitude by increasing the hopper angle. In addition, we find that for very large hopper angles, the avalanche size (s) grows with the outlet size (D) stepwise, in contrast to the case of a flat-bottom silo for which s grows smoothly with D. This surprising effect is originated from the static equilibrium requirement imposed by the hopper geometry to the arch that arrests the flow. The hopper angle sets the bounds of the possible angles of the vectors connecting consecutive beads in the arch. As a consequence, only a small and specific portion of the arches that jam a flat-bottom silo can survive in hoppers.

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Clogging in constricted suspension flows

Cited by 66 publications

References 26 publications

Particle Migration and Clogging in Porous Media: A Convergent Flow Microfluidics Study

Particle Migration and Clogging in Porous Media: A Convergent Flow Microfluidics Study

Growth of clogs in parallel microchannels

Effect of hopper angle on granular clogging

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