Analytic modelling and experimental study of the porosity and permeability of a porous medium—application to cement mortars and granitic rock

The problem of the effect of a normal harmonic force on a porous beam in a 3D formulation is solved using the boundary-element method. A homogeneous fully saturated elastic porous medium is described using Biot’s mathematical model. The effect of the porosity and permeability parameters on the deflection of the beam and the distribution of pore pressure over the beam thickness is investigated. The comparison of the boundary-element solution with a 2D numerical-analytical one is given.

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Experimental study of methane hydrate formation and decomposition in the porous medium with different thermal conductivities and grain sizes

Applied Energy ◽

10.1016/j.apenergy.2021.117852 ◽

2022 ◽

Vol 305 ◽

pp. 117852

Author(s):

Xiao-Yan Li ◽

Jing-Chun Feng ◽

Xiao-Sen Li ◽

Yi Wang ◽

Heng-Qi Hu

Keyword(s):

Experimental Study ◽

Porous Medium ◽

Methane Hydrate ◽

Hydrate Formation ◽

Grain Sizes ◽

Thermal Conductivities

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Experimental study on rheological properties of cement mortars

Journal of Adhesion Science and Technology ◽

10.1080/01694243.2020.1826790 ◽

2020 ◽

pp. 1-18

Author(s):

Ning Chen ◽

Peiming Wang ◽

Liqun Zhao ◽

Qingguang Dong

Keyword(s):

Experimental Study ◽

Rheological Properties ◽

Cement Mortars

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Simulating the Filtration Effects of Cement-Grout in Fractured Porous Media with the 3D Unified Pipe-Network Method

Processes ◽

10.3390/pr7010046 ◽

2019 ◽

Vol 7 (1) ◽

pp. 46 ◽

Cited By ~ 2

Author(s):

Zizheng Sun ◽

Xiao Yan ◽

Weiqi Han ◽

Guowei Ma ◽

Yiming Zhang

Keyword(s):

Porous Medium ◽

Cement Grout ◽

Pipe Network ◽

Grout Injection ◽

Two Phase ◽

Penetration Process ◽

Fractured Porous Medium ◽

Fractured Medium ◽

Network Method ◽

Porosity And Permeability

In grouting process, filtration is the retention and adsorption of cement-grout particles in a porous/fractured medium. Filtration partly/even completely blocks the transportation channels in the medium, greatly decreasing its permeability. Taking into account filtration effects is essential for accurately estimating the grout penetration region. In this paper, the 3D unified pipe-network method (UPM) is adopted for simulating 3D grout penetration process in a fractured porous medium, considering filtration effects. The grout is assumed to exhibit two-phase flow, and the filtration effects depend on not only the concentration and rheology of the grout but also the porosity and permeability of the fractured porous medium. By comparing the model with the experimental results, we firstly verify the proposed numerical model. Then sensitivity analysis is conducted, showing the influences of grout injection pressures, the water–cement ratios of grout (W/C) and the grout injection rates on filtration effect. Finally, the grout filtration process in a complex 3D fractured network is simulated, indicating that the size of the grout penetration region is limited due to filtration.

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Deep bed filtration with multiple pore-blocking mechanisms

MATEC Web of Conferences ◽

10.1051/matecconf/201819604003 ◽

2018 ◽

Vol 196 ◽

pp. 04003 ◽

Cited By ~ 5

Author(s):

Liudmila Kuzmina ◽

Yuri Osipov

Keyword(s):

Porous Medium ◽

Size Exclusion ◽

Medium Size ◽

Deep Bed Filtration ◽

Pore Blocking ◽

Variable Porosity ◽

Monodisperse Suspension ◽

Porosity And Permeability ◽

Constant Coefficients ◽

Blocking Mechanisms

A one-dimensional model for the deep bed filtration of a monodisperse suspension in a porous medium with variable porosity and permeability and multiple pore-blocking mechanisms is considered. It is assumed that the small pores are clogged by separate particles; pores of medium size, exceeding the diameter of the particles, can be blocked by arched bridges, forming stable structures at the pore throats. These pore-blocking mechanisms - size-exclusion and different types of bridging act simultaneously. Exact solutions are obtained for constant coefficients, on the concentrations front and at the porous medium inlet.

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