Channelization in porous media driven by erosion and deposition

Jäger, Robin; Mendoza, M.; Herrmann, Hans J.

doi:10.1103/physreve.95.013110

Cited by 33 publications

(51 citation statements)

References 30 publications

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“…The voxels have a mass index between 0 and 1, for mass index 0 it is a fluid node and for one a solid cell (see Ref. [17]). Using this scheme we can construct any pore shape desired.…”

Section: Particle-wall Interactionmentioning

confidence: 99%

Clogging at pore scale and pressure-induced erosion

2018

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Introducing a model to study deposition and erosion of single particles at microscopic scale, we investigate the clogging and erosive processes in a pore. The particle diameter, concentration, and adhesive forces rule the way particles are deposited, and therefore, characterize the clogging process. We study the hydraulic pressure that induces erosive bursts and conclude that this pressure depends linearly on the deposited volume and inversely on the pores' diameter. While cohesion does not play an important role for erosive bursts, the adhesion is the main force initiating clogging and when overcome by the hydraulic pressure, erosive bursts are triggered. Finally, we show how the magnitude of erosive bursts depends on the pore length, particle diameter and pore size.

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“…The voxels have a mass index between 0 and 1, for mass index 0 it is a fluid node and for one a solid cell (see Ref. [17]). Using this scheme we can construct any pore shape desired.…”

Section: Particle-wall Interactionmentioning

confidence: 99%

Clogging at pore scale and pressure-induced erosion

2018

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“…Based on the work of Yamamoto et al [16], we proposed an extended model [17] that allowed us to study erosion due to shear force, showing that static channels can form but no re-opening of clogged channels was observed. This model was not able to reproduce the erosive bursts found in Bianchi's experiments [8], and therefore, another mechanism for erosion must be acting.…”

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confidence: 99%

“…Note that C is a volume concentration, giving the volume of solute divided by the total volume. See reference [17] for the description of the algorithm. Thus while suspended particles are approximated using the convectiondiffusion equation and hence point-like, they still occupy a volume, the volume of deposit is equal to…”

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confidence: 99%

Mechanism behind Erosive Bursts In Porous Media

2017

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Erosion and deposition during flow through porous media can lead to large erosive bursts that manifest as jumps in permeability and pressure loss. Here we reveal that the cause of these bursts is the reopening of clogged pores when the pressure difference between two opposite sites of the pore surpasses a certain threshold. We perform numerical simulations of flow through porous media and compare our predictions to experimental results, recovering with excellent agreement shape and power-law distribution of pressure loss jumps, and the behavior of the permeability jumps as a function of particle concentration. Furthermore, we find that erosive bursts only occur for pressure gradient thresholds within the range of two critical values, independent of how the flow is driven. Our findings provide a better understanding of sudden sand production in oil wells and breakthrough in filtration.

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“…In turn, the resolution of the calculation imposes restrictions on the largest system size that we are able to study. Finite size effects for the studied systems may result in small anisotropies in the permeability tensor [15], but recent studies show that transport in complex porous geometries can be reasonably well captured if the size of the system is roughly 10 times larger than the pore size [23,41,48,49].…”

Section: Lattice Boltzmann Simulationsmentioning

confidence: 99%

Fluid flow through packings of elastic shells

Gniewek

Hallatschek

2019

Phys. Rev. E

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Fluid transport in porous materials is commonly studied in geological samples (soil, sediments etc.) or idealized systems, but the fluid flow through compacted granular materials, consisting of substantially strained granules, remains relatively unexplored. As a step towards filling this gap, we study a model of liquid transport in packings of deformable elastic shells using Finite Element and Lattice-Boltzmann methods. We find that the fluid flow abruptly vanishes as the porosity of the material falls below a critical value, and the flow obstruction exhibits features of a percolation transition. We further show that the fluid flow can be captured by a simplified permeability model in which the complex porous material is replaced by a collection of disordered capillaries, which are distributed and shaped by the percolation transition. To that end, we numerically explore the divergence of hydraulic tortuosity τH and the decrease of a hydraulic radius R h as the percolation threshold is approached. We interpret our results in terms of scaling predictions derived from the percolation theory applied to random packings of spheres.

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Channelization in porous media driven by erosion and deposition

Cited by 33 publications

References 30 publications

Clogging at pore scale and pressure-induced erosion

Clogging at pore scale and pressure-induced erosion

Mechanism behind Erosive Bursts In Porous Media

Fluid flow through packings of elastic shells

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