Modeling of the transport and deposition of polydispersed particles: Effects of hydrodynamics and spatiotemporal evolution of the deposition rate

Ma, Enze; Ouahbi, Tariq; Wang, Huaqing; Ahfir, Nasre-Dine; Alem, Abdellah; Hammadi, Ahmed

doi:10.1016/j.envpol.2017.11.017

Cited by 15 publications

(7 citation statements)

References 75 publications

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“…The conventional model (dotted lines) with a spatially constant filter coefficient λ0 generally simulated results that were lower than the experiment data, and the discrepancies with the experimental values increased as the inlet concentration decreased. Just like many other studies, the presence of a steady-state concentration plateau was not observed either, which suggested that straining might play a significant role during the experiments [35,58,59]. Figure 7 indicates that the modified model (solid lines) of the depth-dependent initial filter coefficient λ 0 (z) is able to simulate the effluent concentration, since a good description of the experimental BTCs with those calculated by the model is obtained for the entire range of SP concentrations examined.…”

Section: Sp Transport and Retention In The Porous Mediumsupporting

confidence: 64%

“…When the polydisperse suspension moves from the top of the filter bed to the bottom, a proportion of particles will be captured by the medium, and the PSD will constantly change along the length (Figure 3) and the filter coefficient also varies with time and space. In general, large particles are easily captured by the porous medium as compared to the small particles [35,52], and the relative concentration of small particles increases (Figure 3). Large particles are predominantly retained at the upper parts of the column, with small particles being more likely to transport through the porous medium.…”

Section: Modelling Aspectsmentioning

confidence: 99%

“…The deposition rate for a stable polydisperse suspension is highly dependent on the particle size distribution [34]. As a result, some models with two kinetic retention coefficients have been developed, with a fast deposition rate representing up-gradient "sticky" particles and a slow deposition rate representing "less-sticky" particles [27,30,35]. Figure 11 shows the model predictions for the spatial distribution of filter coefficients (deposition rates) at the end of the experiments for different SP concentrations.…”

Section: Spatial and Temporal Evolution Of Filter Coefficientmentioning

confidence: 99%

“…However, natural stormwater is characterized with highly polydisperse SP that displays wider particle size distribution [34]. Few attempts have been made to explore the influence of polydispersity on transport and deposition of SP [35,36]. The variation of particle size distribution of particle populations governs the deposition rate of polydisperse particles [37][38][39].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Physical Experiment and Modeling of the Transport and Deposition of Polydisperse Particles in Stormwater: Effects of a Depth-Dependent Initial Filter Coefficient

Zou

Shu

Min

et al. 2019

Water

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The artificial recharge of stormwater is an effective approach for replenishing aquifer and reduce urban waterlogging, but prone to clogging by suspended particles (SP) that are highly heterogeneously sized. In this paper, the transport and deposition of SP in a sand column were investigated under a constant flow condition, for five stormwater concentrations. A depth-dependent initial filter coefficient is incorporated into the conventional filtration model. This modified model considers the heterogeneity of the particle population by lumping the capture of heterogeneous SP into a capture probability. The good agreement between the results of the modified model and the experimental results of measured outlet concentration and average specific deposit validated the modified model. The experiment data and the simulation results both indicate that the highly hyper-exponential retention profiles are caused by non-uniform deposition of heterogeneous SP; and, the conventional model was found to homogenize the spatial distribution of SP retention and overestimate retention of the porous medium. Local and overall permeability reductions were assessed by an empirical relationship and the Kozeny-Carman model, respectively. It is shown that consideration of polydisperse suspended particles is of primary importance. This study highlights the effects of polydisperse particles on SP deposition in a saturated porous medium.

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Section: Sp Transport and Retention In The Porous Mediumsupporting

confidence: 64%

Section: Modelling Aspectsmentioning

confidence: 99%

Section: Spatial and Temporal Evolution Of Filter Coefficientmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Physical Experiment and Modeling of the Transport and Deposition of Polydisperse Particles in Stormwater: Effects of a Depth-Dependent Initial Filter Coefficient

Zou

Shu

Min

et al. 2019

Water

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“…Two-component suspensions consisting of two disperse components with different concentrations and kinetic properties represent the simplest form of a multicomponent suspension. In most cases two component suspension have been studied [41][42][43][44][45][46].…”

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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Pore-scale simulation of the influence of grain material of artificial porous media on the motion and deposition of suspended particle

Lu,

Zang,

Yang

et al. 2024

Advances in Water Resources

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Modeling of the transport and deposition of polydispersed particles: Effects of hydrodynamics and spatiotemporal evolution of the deposition rate

Cited by 15 publications

References 75 publications

Physical Experiment and Modeling of the Transport and Deposition of Polydisperse Particles in Stormwater: Effects of a Depth-Dependent Initial Filter Coefficient

Physical Experiment and Modeling of the Transport and Deposition of Polydisperse Particles in Stormwater: Effects of a Depth-Dependent Initial Filter Coefficient

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

Pore-scale simulation of the influence of grain material of artificial porous media on the motion and deposition of suspended particle

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