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Experimental study on workability and permeability of sandy soils conditioned with thickened foam

Feng, Zhiyao (author), Wang, Shuying (author), Qu, Tongming (author), Zheng, X. (author), Ling, Fanlin (author)

Water spewing and muck plugging often occur during earth pressure balance (EPB) shield machines tunnelling in water-rich sandy strata, even though the conventional foam has been employed to condition sandy soils. In this study, a novel thickened foaming agent suitable for EPB shield tunnelling in water-rich sandy strata is developed. In...

journal article 2024

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Unifying the Conversation: Membrane Separation Performance in Energy, Water, and Industrial Applications

Dischinger, Sarah M. (author), Miller, Daniel J. (author), Vermaas, D.A. (author), Kingsbury, Ryan S. (author)

Dense polymer membranes enable a diverse range of separations and clean energy technologies, including gas separation, water treatment, and renewable fuel production or conversion. The transport of small molecular and ionic solutes in the majority of these membranes is described by the same solution-diffusion mechanism, yet a comparison of...

review 2024

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Liquid injectivity in a SAG foam process: Effect of permeability

Gong, J. (author), Wang, Yuan (author), Kamarul Bahrim, Ridhwan Zhafri B. (author), Tewari, Raj Deo (author), Mahamad Amir, Mohammad Iqbal (author), Farajzadeh, R. (author), Rossen, W.R. (author)

Foam is utilized in enhanced oil recovery and CO₂ sequestration. Surfactant-alternating-gas (SAG) is a preferred approach for placing foam into reservoirs, due to it enhances gas injection and minimizes corrosion in facilities. Our previous studies with similar permeability cores show that during SAG injection, several banks occupy...

journal article 2024

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Modelling of phenomena affecting blast furnace burden permeability using the Discrete Element Method (DEM) – A review

Roeplal, R.N. (author), Pang, Y. (author), Adema, Allert (author), van der Stel, Jan (author), Schott, D.L. (author)

Bed permeability is a crucial factor in blast furnace efficiency and stability. The Discrete Element Method (DEM) has been used extensively to model material flow in different parts of the furnace and holds great potential for optimizing the permeability. The inherent computational load is the main bottleneck in using this method to provide...

review 2023

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Numerical modelling of wave overtopping discharges at rubble mound breakwaters using OpenFOAM®

Mata, Marisol Irías (author), van Gent, M.R.A. (author)

Numerical modelling of wave interaction with rock-armoured rubble mound breakwaters has been performed to study wave overtopping. The influences of the slope angle, a berm in the seaward slope, a protruding crest wall, a recurved parapet, and the wave steepness have been studied using a validated CFD model (OpenFOAM). The numerical modelling...

journal article 2023

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Deep learning based prediction of fibrous microstructure permeability

Caglar, Baris (author), Broggi, G.C. (author), Ali, Muhammad A. (author), Orgéas, Laurent (author), Michaud, Véronique (author)

Knowledge of permeability of fibrous microstructures is crucial for predicting the mold fill times and resin flow path in composite manufacturing. Herein we report a method to rapidly predict the permeability of 3D fibrous microstructures. Our method relies on predicting the permeability of 2D cross-sections via deep neural networks and...

conference paper 2022

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Effect of superabsorbent polymer introduction on properties of alkali-activated slag mortar

Yang, Zhengxian (author), Shi, Peng (author), Zhang, Yong (author), Li, Z. (author)

Internal curing by superabsorbent polymer (SAP) has been applied in alkali-activated slag (AAS) systems by a few previous studies with the purpose to mitigate the autogenous shrinkage. However, the effects of SAP on other properties of AAS have been rarely studied. In this paper, the workability, strength, permeability, and frost resistance...

journal article 2022

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Topographic features of nano-pores within the osteochondral interface and their effects on transport properties –a 3D imaging and modeling study

Pouran, Behdad (author), Raoof, Amir (author), de Winter, D. A.Matthijs (author), Arbabi, V. (author), Bleys, Ronald L.A.W. (author), Beekman, F.J. (author), Zadpoor, A.A. (author), Malda, Jos (author), Weinans, Harrie (author)

Recent insights suggest that the osteochondral interface plays a central role in maintaining healthy articulating joints. Uncovering the underlying transport mechanisms is key to the understanding of the cross-talk between articular cartilage and subchondral bone. Here, we describe the mechanisms that facilitate transport at the osteochondral...

journal article 2021

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Origin and distribution of grain-coating and pore-filling chlorite in deltaic sandstones for reservoir quality assessment

Griffiths, Joshua (author), Worden, Richard H. (author), Utley, James E.P. (author), Brostrøm, Christian (author), Martinius, A.W. (author), Lawan, Auwalu Y. (author), Al-Hajri, Ali I. (author)

Grain-coating chlorite preserves porosity and permeability through the inhibition of quartz cement whereas pore-filling chlorite blocks pore-throats and diminishes reservoir quality. The aim of this study is to determine the origin and principal mechanisms which govern the distribution of grain-coating and pore-filling chlorite in Jurassic...

journal article 2021

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Measuring the Degree of Permeability of the Main Route Network with Angular Step Depth Analyses

van Nes, A. (author)

Inthiscontributionanewspacesyntaxanalysesmethodispresentedfor analysing the degree of permeability in the main route network of towns and cities. First, a presentation is given on the methodological development of the various approaches taken until the present day. Then, a description is given on how this new analysis method can be used to...

conference paper 2021

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Effect of compaction and soil moisture on the effective permeability of sands for use in methane oxidation systems

van Verseveld, C.J.W. (author), Gebert, J. (author)

Effective gas permeability is an important parameter in the design of methane oxidation systems, governing diffusive oxygen ingress and the spatial spread of landfill gas. The influences of soil texture, compaction, soil moisture and the resulting air filled porosity on the gas permeability were researched by performing pressure loss...

journal article 2020

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Hydraulic-mechanical properties of microfaults in granitic rock using the Punch-Through Shear test

Kluge, C. (author), Blöcher, Guido (author), Barnhoorn, A. (author), Bruhn, D.F. (author)

Fault zones are key features in crystalline geothermal reservoirs or in other subsurface environments due to the fact that they act as main fluid pathways. An adequate experimental description of the evolution of permeability of a realistic microscopic fault zone under in-situ reservoir and fracture parallel flow conditions is required. To...

journal article 2020

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Cauchy-based modelling in cementitious materials technology

Stroeven, P. (author), Słowik, M. (author)

Cauchy paved the way for constructing models in concrete technology, and elsewhere. He determined the (non-flat) surface area in 3D by measuring random total projections. Analogously, he determined the length of a curved line in 2D by way of measuring the total projections. The paper will present the mathematical expressions, because in many...

journal article 2020

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The contribution of lipid peroxidation to membrane permeability in electropermeabilization: A molecular dynamics study

Rems, L. (author), Viano, Marilyne (author), Kasimova, Marina A. (author), Miklavčič, Damijan (author), Tarek, Mounir (author)

Electroporation or electropermeabilization is a technique that enables transient increase in the cell membrane permeability by exposing cells to pulsed electric field. However, the molecular mechanisms of the long-lived cell membrane permeability, which persists on the minutes time scale after the pulse treatment, remain elusive. Experimental...

journal article 2019

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A network model for the biofilm growth in porous media and its effects on permeability and porosity

Lopez Pena, L.A. (author), Meulenbroek, B.J. (author), Vermolen, F.J. (author)

Successful microbial enhanced oil recovery depends on several factors like reservoir characteristics and microbial activity. In this work, a pore network is used to study the hydrodynamic evolution over time as a result of the development of a biofilm in the pores. A new microscopic model is proposed for biofilm growth which takes into...

journal article 2019

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Effect of nut coke addition on physicochemical behaviour of pellet bed in ironmaking blast furnace

Gavel, D.J. (author), Adema, A.T. (author), Stel, Jan Van Der (author), Sietsma, J. (author), Boom, R. (author), Yang, Y. (author)

One of the primary causes that limit the blast furnace productivity is the resistance exerted to the gas flow in the cohesive zone by the ferrous burden. Use of nut coke (10–40 mm) together with ferrous burden proves beneficial for decreasing this resistance. In present study, effect of nut coke addition on the olivine fluxed iron ore pellet...

journal article 2019

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Carbon dioxide flow and interactions in a high rank coal: Permeability evolution and reversibility of reactive processes

Hadi Mosleh, Mojgan (author), Turner, Matthew (author), Sedighi, Majid (author), Vardon, P.J. (author)

Uncertainties exist on the efficiency of CO₂ injection and storage in deep unminable coal seems due to potential reduction in the permeability of coal that is induced by CO₂ adsorption into the coal matrix. In addition, there is a limited knowledge about the stability of CO₂ stored in coal due to changes in...

journal article 2018

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Effect of porosity variation strategy on the performance of functionally graded Ti-6Al-4V scaffolds for bone tissue engineering

Zhang, Xiang Yu (author), Fang, Gang (author), Xing, Lei Lei (author), Liu, Wei (author), Zhou, J. (author)

Functionally graded scaffold (FGS) is designed to mimic the morphology, mechanical and biological properties of natural bone closely. Porosity variation strategy between different regions in FGS plays a crucial role in influencing its mechanical and biological performance. A combination of modeling tool and scripting language can effectively...

journal article 2018

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Fluid flow from matrix to fractures in Early Jurassic shales

Houben, M. E. (author), Hardebol, N.J. (author), Barnhoorn, A. (author), Boersma, Q.D. (author), Carone, A. (author), Liu, Y. (author), de Winter, D. A.M. (author), Peach, C. J. (author), Drury, M. R. (author)

The potential of shale reservoirs for gas extraction is largely determined by the permeability of the rock. Typical pore diameters in shales range from the μm down to the nm scale. The permeability of shale reservoirs is a function of the interconnectivity between the pore space and the natural fracture network present. We have measured the...

journal article 2017

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Systematic research on compucrete can shed light on some controversial issues in concrete technology

Li, K. (author), Stroeven, P. (author)

Realistically simulating fresh and hardening cementitious materials renders possible understanding controversial issues existing in the field of concrete technology. The experimental studies on the impact of the interfacial transition zone (ITZ) on permeability of concrete reveal two controversial results. The first involves the concept of...

review 2017