Effects of Particle Size Non-Uniformity on Transport and Retention in Saturated Porous Media

Hammadi, Ahmed; Ahfir, Nasre-Dine; Alem, Abdellah; Wang, Huaqing

doi:10.1007/s11242-017-0848-6

Cited by 13 publications

(4 citation statements)

References 44 publications

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“…In practical engineering, the particle size distribution of FPs is often inhomogeneous. For this, selecting five particle sizes (10,20,30,40, and 50 μm) to form mixed graded particles and injecting them into the soil column. The number of five kinds of FPs is the same.…”

Section: B the Effect Of Mixed Particle Size On Sieving Effectmentioning

confidence: 99%

“…9 Hammadi et al studied the influence of the inhomogeneity of FPs size on the seepage process. 10 The results showed that the inhomogeneity of FPs makes smaller FPs more likely to deposit after the deposition of larger FPs. Bai et al investigated the coupling migration process of heavy metal ions and silica particles at different temperatures.…”

Section: Introductionmentioning

confidence: 96%

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Migration trajectories and blocking effect of the fine particles in porous media based on particle flow simulation

Bai,

Chen,

Zhang

et al. 2024

AIP Advances

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The particle flow code method based on the discrete element method was used to establish the seepage migration model of fine particles [fine particles (FPs), i.e., suspended particles] in a porous medium. A series of numerical simulations were carried out by changing the particle size, seepage velocity, particle injection number, and wide particle size gradation. The research showed that large FPs play a major role in blocking porous medium channels when the injected FPs have a wide size gradation. Due to the blocking effect, small FPs that would not otherwise have deposited also deposit. Moreover, by increasing the number of large FPs in the mixed particles, the total number of particles deposited and the number of smaller FPs deposited will also increase. The distribution of FPs in porous mediums can be divided into three types: surface deposition, internal deposition, and non-deposition. When the seepage velocity increases and reaches a seepage threshold, which is the critical seepage velocity, the deposited FPs will once again be in a suspended state and undergo migration. On the contrary, the FPs will continue to maintain their sedimentary state, and the critical seepage velocity will also increase correspondingly with increasing particle size.

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Section: B the Effect Of Mixed Particle Size On Sieving Effectmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Migration trajectories and blocking effect of the fine particles in porous media based on particle flow simulation

Bai,

Chen,

Zhang

et al. 2024

AIP Advances

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“…Where Q is the volumetric flow rate, S is the cross-sectional area, and l is the spacing between the two plane walls. The adhesive forces FA was estimated as [25]:…”

Section: Forces Acting On the Transported Particlesmentioning

confidence: 99%

Laboratory Studies on the Influence of Ionic Strength on Particle Transport Behavior in a Saturated Porous Medium

Lyacine,

Nassim,

Djilali

2023

AEF

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An experimental study has been undertaken to investigate the effect of flow velocity and ionic strength on the transport of suspended particles (SP) and their deposition in a saturated porous medium. The SP injections were carried out using a laboratory column filled with sand and a pulse injection method. Ionic strengths varying between 0 and 600 mM (NaCl) have prospected. Two velocities were tested: 0.15 and 0.30 cm/s. Selected polydisperse particles diameters ranging from 0.27 to 5 μm and a median diameter (dp50) equal to 2.25 μm were used. An analytical solution of the convection–dispersion equation with first-order deposition kinetics was used to describe the experimental breakthrough curves and to identify the transport parameters. The results show that the increase of ionic strength promotes the retention of the SP in the porous medium. In addition, retention is more important when the flow velocity is low. The deposition kinetics coefficient increases with increasing ionic strength and flow velocity.

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“…The solid particles suspended in the suspension can differ in their properties, that is to say, they can have different geometric, physicochemical and electrokinetic characteristics [34,38,39]. Many recent works takes into account the polydispersity of suspension [6,[40][41][42][43][44][45]. Two-component suspensions consisting of two disperse components with different concentrations and kinetic properties represent the simplest form of a multicomponent suspension.…”

Section: Introductionmentioning

confidence: 99%

A Deep Bed Filtration Model of Two-Component Suspension in Dual-Zone Porous Medium

et al. 2020

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In the paper, a mathematical model for the filtration of two-component suspensions in a dual-zone porous medium is considered. The model consists of the mass balance equations, the kinetic equations for active and passive zones of porous medium for each component of the suspension and Darcy’s law. To solve the problem, a numerical algorithm for computer experimentation is developed on the basis of finite difference method. Based on numerical results, the main characteristics of suspension filtration in a porous medium are established. Influences of model parameters on transport and deposition of suspended particles of two-component suspension in porous media are analysed. It is shown that the polydispersity of suspension and multistage nature of the deposition kinetics can lead to various effects that are not characteristic for the transport of one-component suspensions with one-stage particle deposition kinetics. In particular, in distribution of the concentration of suspended particles in a moving fluid non-monotonic dynamics are obtained at individual points in the medium. It is shown that at the points of the medium near to the input section, the concentration of deposited particles can reach partial capacities in the passive zone.

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Effects of Particle Size Non-Uniformity on Transport and Retention in Saturated Porous Media

Cited by 13 publications

References 44 publications

Migration trajectories and blocking effect of the fine particles in porous media based on particle flow simulation

Migration trajectories and blocking effect of the fine particles in porous media based on particle flow simulation

Laboratory Studies on the Influence of Ionic Strength on Particle Transport Behavior in a Saturated Porous Medium

A Deep Bed Filtration Model of Two-Component Suspension in Dual-Zone Porous Medium

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