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1. Shear-flow coupling characteristics of a three-dimensional discrete fracture network-fault model considering stress-induced aperture variations

Author:
Huang, Na; Liu, Richeng; Jiang, Yujing; Cheng, Yuanfang; Li, Bo
Source:
Journal of hydrology 2019 v.571 pp. 416-424
ISSN:
0022-1694
Subject:
permeability,   etc   ; hydrology; models;     Show all 3 Subjects
Abstract:
... This study presents a three-dimensional discrete fracture network-fault (3D DFN-fault) model that contains a 3D DFN and a deformable 3D fault. The fault slip-induced shear displacement and normal displacement are taken into account. Under a constant normal stiffness (CNS) boundary condition, the normal displacement gives rise to an increase in the normal stress and a decrease in the aperture of th ...
DOI:
10.1016/j.jhydrol.2019.01.068

2. Aligned Fe microfiber reinforced epoxy composites with tunable electromagnetic properties and improved microwave absorption

Author:
Qing, Yuchang; Nan, Hanyi; Jia, Hongyao; Min, Dandan; Zhou, Wancheng; Luo, Fa
Source:
Journal of materials science 2019 v.54 no.6 pp. 4671-4679
ISSN:
0022-2461
Subject:
permeability,   etc   ; absorption; epoxides; iron;     Show all 4 Subjects
Abstract:
... Aligned Fe microfiber/epoxy composites (FMF/EP) were prepared by shear force. The effects of the alignment on the morphology, electromagnetic properties and microwave absorption performances were studied. The results showed that the FMF inclines to be aligned uniformly after alignment treatment. The aligned FMF/EP composite exhibits higher complex permeability and lower complex permittivity in the ...
DOI:
10.1007/s10853-018-03192-y

3. Experimental investigation on the stress sensitivity of permeability in naturally fractured shale

Author:
Yang, Diansen; Wang, Wei; Li, Kang; Chen, Weizhong; Yang, Jianping; Wang, Shugang
Source:
Environmental earth sciences 2019 v.78 no.2 pp. 55
ISSN:
1866-6280
Subject:
permeability,   etc   ; roughness; shale;     Show all 3 Subjects
Abstract:
... In this paper, we present an experimental investigation regarding the stress sensitivity of permeability in naturally fractured shale. Gas permeability tests were performed on the fractured cylindrical shale samples under loading and unloading conditions. Different hydrostatic stress and gas pressure levels were chosen to investigate the dependence of permeability on stress. The permeability of th ...
DOI:
10.1007/s12665-019-8045-2

4. Experimental study of flow characteristics around floodplain single groyne

Author:
Mostafa, Mona M.; Ahmed, Hassan S.; Ahmed, Ashraf A.; Abdel-Raheem, Gamal A.; Ali, Nashat A.
Source:
Journal of hydro-environment research 2019 v.22 pp. 1-13
ISSN:
1570-6443
Subject:
permeability,   etc   ; floodplains; rivers;     Show all 3 Subjects
Abstract:
... This study investigated the flow around river’s floodplain single groynes. Two different compound channels with one and two symmetrical floodplains having widths of 1- and 2-times of the main channel width, respectively, were used. Both impermeable and permeable groynes with three different relative lengths (relative to the floodplain width) and having three different permeability values of 40, 60 ...
DOI:
10.1016/j.jher.2018.08.003

5. Monoliths: Synthetic routes, functionalization and innovative analytical applications

Author:
Gama, Mariana R.; Rocha, Fábio R.P.; Bottoli, Carla B.G.
Source:
Trends in analytical chemistry 2019 v.115 pp. 39-51
ISSN:
0165-9936
Subject:
permeability,   etc   ; chromatography; extraction; sampling; separation;     Show all 5 Subjects
Abstract:
... Monolithic materials stand out in separation sciences because of their tunable properties, easy preparation, high permeability, and readily available surface chemistries. The number of analytical applications of monoliths has increased in recent decades, including innovations in sample preparation, chromatography and, more recently, in flow analysis. This review covers these innovative application ...
DOI:
10.1016/j.trac.2019.03.020

6. Asymmetric hydrogel-composite membranes with improved water permeability and self-healing property

Author:
Getachew, Bezawit A.; Guo, Wenji; Zhong, Mingjiang; Kim, Jae-Hong
Source:
Journal of membrane science 2019 v.578 pp. 196-202
ISSN:
0376-7388
Subject:
permeability,   etc   ; asymmetric membranes; hydrogels; viscosity;     Show all 4 Subjects
Abstract:
... Hydrogel-composite membranes fabricated using poly(2-acrylamido-2-methyl-1-propanesulfonic acid) (PAMPS) hydrogel and a polyethersulfone (PES) support present a promising avenue toward developing self-healing membranes—membranes that autonomously heal from physical damage without any external intervention. The previously developed pore-filled structure, however, suffers from low water permeability ...
DOI:
10.1016/j.memsci.2019.01.022

7. Influences of degree of saturation and stress cycle on gas permeability of unsaturated compacted Gaomiaozi bentonite

Author:
Wei, Tianyu; Hu, Dawei; Zhou, Hui; Lu, Jingjing; Lü, Tao
Source:
Engineering geology 2019 v.254 pp. 54-62
ISSN:
0013-7952
Subject:
permeability,   etc   ; advection; bentonite; radioactive waste;     Show all 4 Subjects
Abstract:
... Compacted bentonite is usually used as the backfill material in underground storage of radioactive waste due to its swelling properties and low permeability. To understand the effects of the degree of saturation and stress cycle on the barrier properties of compacted bentonite, gas permeability tests were performed on highly compacted bentonite with different dry densities, water contents and stre ...
DOI:
10.1016/j.enggeo.2019.04.005

8. Various influence of surface modification on permeability and phase stability through an oxygen permeable membrane

Author:
Xue, Jian; Weng, Guowei; Chen, Li; Suo, Yanpeng; Wei, Yanying; Feldhoff, Armin; Wang, Haihui
Source:
Journal of membrane science 2019 v.573 pp. 588-594
ISSN:
0376-7388
Subject:
permeability,   etc   ; artificial membranes; coatings; oxygen;     Show all 4 Subjects
Abstract:
... Good oxygen permeability and stability of oxygen transport membrane are highly necessary for practical applications. Herein, through different theories, the oxygen transport limitation step through the Ruddlesden-Popper (Pr0.9La0.1)1.9Ni0.74Cu0.21Ga0.05O4+δ ((PL)1.9NCG) membrane was demonstrated firstly, which suggest surface modification can be an effective approach to improve the oxygen separati ...
DOI:
10.1016/j.memsci.2018.12.040

9. Trapping of Sand-Sized Particles Exterior and Interior to Large Porous Roughness Forms in the Atmospheric Surface Layer

Author:
Gillies, John A.; Etyemezian, Vic; Nikolich, George
Source:
Boundary-layer meteorology 2019 v.170 no.3 pp. 443-469
ISSN:
0006-8314
Subject:
permeability,   etc   ; geometry; porosity; roughness; sand;     Show all 5 Subjects
Abstract:
... Six same-sized, double-walled, porous cubes constructed of plastic mesh material of different porosity ε were deployed at a field site where they interacted with wind-driven saltation to evaluate their relative potential for sand sequestration (internal and external). The internal mass collected and externally deposited mass and lengths demonstrate that, for large three-dimensional porous forms wi ...
DOI:
10.1007/s10546-018-0402-2

10. Numerical analysis of gas production from layered methane hydrate reservoirs by depressurization

Author:
Feng, Yongchang; Chen, Lin; Suzuki, Anna; Kogawa, Takuma; Okajima, Junnosuke; Komiya, Atsuki; Maruyama, Shigenao
Source:
Energy 2019 v.166 pp. 1106-1119
ISSN:
0360-5442
Subject:
permeability,   etc   ; horizontal wells; methane; Japan;     Show all 4 Subjects
Abstract:
... Many natural methane hydrate (MH) reservoirs are heterogeneous and are characterized by a layered structure. In this study, we numerically investigate gas production from a multi-layered hydrate reservoir by depressurization through a single vertical and a single horizontal well. This layered MH reservoir is constructed based on field test data at the AT1 site of the Eastern Nankai Trough in Japan ...
DOI:
10.1016/j.energy.2018.10.184

11. Hydrogen permeability through Nd5.5W0.35Mo0.5Nb0.15O11.25-δ mixed protonic-electronic conducting membrane

Author:
Chen, Yan; Liu, Hui; Zhuang, Libin; Wei, Yanying; Wang, Haihui
Source:
Journal of membrane science 2019 v.579 pp. 33-39
ISSN:
0376-7388
Subject:
permeability,   etc   ; artificial membranes; carbon dioxide; hydrogen;     Show all 4 Subjects
Abstract:
... A new mixed protonic-electronic conducting material, Nd5.5W0.35Mo0.5Nb0.15O11.25-δ (NWMN), was developed by Nb-doping to improve the hydrogen permeability of Nd5.5W0.5Mo0.5O11.25-δ (NWM). The hydrogen permeation properties and stability of the NWMN were investigated in details. An enhanced hydrogen permeation flux through the NWMN membrane was achieved, which was about 2.5 times as high as that th ...
DOI:
10.1016/j.memsci.2019.02.057

12. Assessment of capillary phenomena in liquid composite molding

Author:
Caglar, Baris; Tekin, Cem; Karasu, Feyza; Michaud, Véronique
Source:
Composites 2019 v.120 pp. 73-83
ISSN:
1359-835X
Subject:
permeability,   etc   ; capillarity; composite materials; fabrics; glass; liquids;     Show all 6 Subjects
Abstract:
... The interplay between capillary and viscous forces plays a significant role for optimal part quality in fiber-reinforced composites manufactured by Liquid Composite Molding (LCM); these are however difficult to analyze during flow. Two approaches are proposed in this study: (i) a woven glass fabric’s surface was modified by corona treatment to improve its wetting characteristics without altering i ...
DOI:
10.1016/j.compositesa.2019.02.018

13. On the variability of permeability induced by reinforcement distortions and dual scale flow in liquid composite moulding: A review

Author:
Bodaghi, M.; Lomov, S.V.; Simacek, P.; Correia, N.C.; Advani, S.G.
Source:
Composites 2019 v.120 pp. 188-210
ISSN:
1359-835X
Subject:
permeability,   etc   ; composite materials; deformation; liquids; manufacturing; models;     Show all 6 Subjects
Abstract:
... A comprehensive review of experimental and analytical studies since 1990 on the variability of permeability induced by fibrous media (reinforcement) distortions across the composite part manufacturing chain is presented. The review covers variability in as-supplied dry reinforcements, which include tow waviness, tow size and tow shape variations, interconnectedness of the pore space inside the tow ...
DOI:
10.1016/j.compositesa.2019.03.004

14. Air permeability and bursting strength of weft-knitted fabrics from glass yarn. Part I: cam setting and number of yarn ply effect

Author:
Ince, Mehmet Erdem; Yildirim, Hilal
Source:
The journal of the Textile Institute 2019 v.110 no.4 pp. 524-534
ISSN:
1754-2340
Subject:
permeability,   etc   ; air; fabrics; fiber content; glass; yarns;     Show all 6 Subjects
Abstract:
... This study revealed the effect of cam setting and number of yarn ply on air permeability and bursting strength of weft-knitted fabrics from glass yarn. Change in cam setting from loose to tight level increased fiber content, and stitch-density; while it decreased loop length. Fabrics with 3-ply yarn exhibited higher fiber content; lower stitch-density; and longer loop length than fabrics with 2-pl ...
DOI:
10.1080/00405000.2018.1492339

15. Asymmetric wetting Janus fabrics with double-woven structure for oil/water separation

Author:
Yao, Chengjian; Luo, Meiyin; Wang, Helan; Xu, Bi; Cai, Zaisheng
Source:
Journal of materials science 2019 v.54 no.7 pp. 5942-5951
ISSN:
0022-2461
Subject:
permeability,   etc   ; fabrics; hydrophilicity; hydrophobicity; oils; wettability; yarns;     Show all 7 Subjects
Abstract:
... The asymmetric wetting Janus fabric with double-woven structure was designed by using two systems of warp yarns and two types of the weft yarns with distinct wettability. The result shows that the fabric with double-woven structure possesses the asymmetric wettability with superhydrophobicity on one side while superhydrophilicity on the other side. This asymmetric wettability realizes a unidirecti ...
DOI:
10.1007/s10853-018-03241-6

16. High CO2-tolerant and Cobalt-free dual-phase membranes for pure oxygen separation

Author:
Du, Zhihong; Ma, Yanhui; Zhao, Hailei; Li, Kui; Lu, Yao
Source:
Journal of membrane science 2019 v.574 pp. 243-251
ISSN:
0376-7388
Subject:
permeability,   etc   ; artificial membranes; carbon dioxide; copper; oxygen;     Show all 5 Subjects
Abstract:
... A series of La0.15Sr0.85FeO3-δ-xLa0.15Ce0.85O2-δ (LSFO-xLDC) and Cu-doped LSFO-70La0.15Ce0.8Cu0.05O2-δ (LSFO-70LDCC) dual-phase membranes were prepared by one-pot method and evaluated systematically as high CO2-tolerant oxygen separation membranes. The results reveal that the stability of the membranes is improved by compositing LDC. Among the studied compositions, the LSFO-70LDC compound shows ex ...
DOI:
10.1016/j.memsci.2018.12.083

17. A New Dimensionless Approach to Assess Relative Permeability Modifiers

Author:
Al-Shajalee, Faaiz; Saeedi, Ali; Wood, Colin
Source:
Energy & fuels 2019 v.33 no.4 pp. 3448-3455
ISSN:
1520-5029
Subject:
permeability,   etc   ; equations; fuels; gases; polymers; porosity;     Show all 6 Subjects
Abstract:
... Water production is one of the common problems that is faced in mature gas reservoirs. A number of methods exist to tackle this problem, including injecting polymer that can selectively reduce water production. There are many factors that affect this treatment, such as rock permeability and porosity, flowing fluid phases, polymer concentration, and the dependency of polymer thickness on the flow r ...
DOI:
10.1021/acs.energyfuels.9b00135

18. Pressure-transient behavior in class III hydrate reservoirs

Author:
Hou, Jian; Zhao, Ermeng; Liu, Yongge; Ji, Yunkai; Lu, Nu; Liu, Yueliang; Li, Huazhou Andy; Bai, Yajie
Source:
Energy 2019 v.170 pp. 391-402
ISSN:
0360-5442
Subject:
permeability,   etc   ; dissociation; gas hydrate; models; temperature; Canada;     Show all 6 Subjects
Abstract:
... Hydrate reservoirs generally have some unique characteristics such as hydrate dissociation and reformation, permeability change, which may result in quite different pressure-transient behavior from that in conventional reservoirs. In this work, we develop the pressure-transient analysis method for Class III hydrate reservoirs. By establishing a 2D cylindrical model, we then conduct a pressure buil ...
DOI:
10.1016/j.energy.2018.12.178

19. Tailoring hydrogen separation performance through the ceramic lanthanum tungstate membranes by chlorine doping

Author:
Chen, Li; Liu, Lingfei; Xue, Jian; Zhuang, Libin; Wang, Haihui
Source:
Journal of membrane science 2019 v.573 pp. 117-125
ISSN:
0376-7388
Subject:
permeability,   etc   ; artificial membranes; ceramics; chlorine; hydrogen; lanthanum;     Show all 6 Subjects
Abstract:
... The influences of solid-state reaction and sol-gel synthesis methods on the permeability through the La5.5W0.6Mo0.4O11.25-δ membranes were investigated firstly. Then the superior sol-gel route was selected to synthesize chlorine-doped La5.5W0.6Mo0.4O11.25-δ-x/2Clx (LWMClx, x = 0–0.20) series membranes. The effects of chlorine doping on hydrogen separation performance through LWMClx hydrogen permea ...
DOI:
10.1016/j.memsci.2018.11.073

20. Highly efficient CO₂ capture by mixed matrix membranes containing three-dimensional covalent organic framework fillers

Author:
Cheng, Youdong; Zhai, Linzhi; Ying, Yunpan; Wang, Yuxiang; Liu, Guoliang; Dong, Jinqiao; Ng, Denise Z. L.; Khan, Saif A.; Zhao, Dan
Source:
Journal of materials chemistry A 2019 v.7 no.9 pp. 4549-4560
ISSN:
2050-7496
Subject:
permeability,   etc   ; carbon dioxide; chemistry; industrial applications; polyethyleneimine;     Show all 5 Subjects
Abstract:
... Mixed matrix membranes (MMMs) have long been considered as promising membrane types for industrial energy-intensive gas separation processes. Current MMMs are still facing grand challenges of poor filler dispersion and poor polymer-filler interfacial compatibility. The present study demonstrates that these challenges can be addressed by fabricating MMMs containing three-dimensional (3D) covalent o ...
DOI:
10.1039/c8ta10333j