Experimental studies and modelling of the fluidization of sands

Kaczmarek, Mariusz; Marciniak, Marek; Szczucińska, Anna

doi:10.1016/j.jhydrol.2019.124205

Cited by 4 publications

(6 citation statements)

References 11 publications

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“…The mathematical model of sand fluidization process in the filtration column has been published before (Kaczmarek et al, 2019; Marciniak et al, 2018). The model was focused on determining the conditions necessary for the process to occur, especially the minimum flow speed and the minimum or critical hydraulic gradient.…”

Section: Methodsmentioning

confidence: 99%

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Parametric study of fluidization conditions of bed sediments in the hyporheic zone

Marciniak

Kaczmarek

Matusiak

et al. 2022

Hydrological Processes

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The phenomenon of fluidization of the bed sediment of the hyporheic zone involves the production of dynamic suspension of solid particles in a stream of water flowing in the direction opposite to gravity. Fluidization may be permanent; then, it becomes a spring or a headwater zone, where groundwater discharge rate is almost unchanged within an entire hydrological year. But it can also occur periodically, depending on the changing hydrodynamic conditions. In such cases, the fluidization of the bed sediment of the hyporheic zone may disturb its functioning by changing the conditions of surface water and groundwater exchange. The disturbances affect hydrodynamic and hydrochemical processes connected with water exchange, but first of all, the living conditions of hyporheic zone flora and fauna.

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Section: Methodsmentioning

confidence: 99%

“…The columns were filled with four sands beds of different granulation. The conditions for carrying out the column experiment were described by (Kaczmarek et al, 2019; Marciniak et al, 2017). Therefore, only the results of column tests will be described here.…”

Section: Methodsmentioning

confidence: 99%

Parametric study of fluidization conditions of bed sediments in the hyporheic zone

Marciniak

Kaczmarek

Matusiak

et al. 2022

Hydrological Processes

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“…Applications in which fluid flow in porous media is the underlying mechanism include hydraulic barriers or fluid injection for the remediation of groundwater contamination and water decontamination, flow through leaching to groundwater, artificial ground freezing to contain groundwater, CO 2 sequestration, groundwater drainage through the fluidisation of sands, or any other changes in groundwater level during recharge or discharge. Other examples of fluid injection events into an aquifer include disposal, managed aquifer recharge (MAR), aquifer storage and recovery (ASR), and the transportation of various fluids in the subsurface [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…For example, numerical Hele-Shaw investigations and experiments have been conducted to study the hydraulics of a well pumped with a variable discharge [9], fluid drainage through fractured media [10], fingered flow through sand [3], fluid-soil interaction [11], and the characteristics of the gas-injection barrier in two-dimensional porous media to understand the unexpected inflow mechanisms of groundwater in an unwanted area [12]. The majority of experiments that examine the effects of flow at the grain scale and any potential alterations of the characteristics of the soil-groundwater system are usually conducted in small size experiments at the mesoscale [7,[13][14][15][16]. Transient flow problems are usually conducted in a similar scale [5,8,17].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of the Effects of Porosity, Hydraulic Conductivity, Strength, and Flow Rate on Fluid Flow in Weakly Cemented Bio-Treated Sands

Konstantinou

Biscontin

2022

Hydrology

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Fluid injection in a porous medium is the underlying mechanism for many applications in the fields of groundwater hydraulics, hydrology and hydrogeology, and geo-environmental engineering and in the oil and gas industry. Fluid flow experiments in porous media with a viscous fluid at varying injection rates were conducted in a modified Hele-Shaw setup. The granular media were three-dimensional bio-cemented sands of various grain sizes across various cementation levels, generating a matrix of various hydraulic conductivities, porosities, and strengths. The fluid injection experiments showed that a cavity-like fracture developed, which transitioned to crack-like fractures at higher cementation levels (hence, higher strength). As the flow rate increased, less infiltration was evident and higher breakdown pressure was observed, with propagation pressure reducing to zero. It was harder to induce an opening in cemented specimens with higher hydraulic conductivity and a larger pore network despite their lower strength due to excessive infiltration dominance, which inhibited the build-up of pressure required to generate a fracture. The results of this study suggest that, when designing fluid injection programs, the combined effects of hydraulic conductivity and strength need to be carefully considered.

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“…He et al [4] investigated the effect of flow rate on fluidization and proposed an analytical model to predict the critical flow rate for fluidization. Vardoulakis [7] and Kaczmarek et al [8] analysed the fluidization process using mathematical modelling. The pressure distribution in a vertical BEP pipe after fluidization is studied by Bezuijen et al [9] and Robbins et al [10].…”

Section: Introductionmentioning

confidence: 99%

The effect of relative density on the response of sand to internal fluidization

et al. 2022

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Fluidization, in the geotechnical engineering context, is a failure mechanism that can occur during piping, leakage in distribution pipes, or leakage through the sheet pile walls and can lead to severe consequences. This phenomenon will occur when the sand bed is subjected to an upward-facing flow.In this case, with sufficient hydraulic gradient, the effective stresses and the contact forces between soil particles will be zero, resulting in mobilization and fluidization of the soil. This paper presents smallscale laboratory tests involving two sands and relative densities (RD). The hydraulic behavior of the sand before and during the fluidization process is presented and analyzed using measurements and analytical calculations. The dimensions of the cavity and the extent of the fluidized zone are presented and investigated by performing image analysis using Digital Image Correlation (DIC). The analysis indicates that an increase in flow rate and porosity of the sand specimen characterized the onset of soil deformation. The findings also demonstrate considerably higher hydraulic pressures just before fluidization in tests with high RD which indicates larger resistance of dense specimens to the soil fluidization. At the time of fluidization, a significantly larger failure extent is measured in tests with high RD and finer sand specimens.

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Experimental studies and modelling of the fluidization of sands

Cited by 4 publications

References 11 publications

Parametric study of fluidization conditions of bed sediments in the hyporheic zone

Parametric study of fluidization conditions of bed sediments in the hyporheic zone

Experimental Investigation of the Effects of Porosity, Hydraulic Conductivity, Strength, and Flow Rate on Fluid Flow in Weakly Cemented Bio-Treated Sands

The effect of relative density on the response of sand to internal fluidization

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