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1. DEM study of the porosity distribution of pellet sandpile formed by ternary size particles

Author:
Wei, Han; Ge, Yao; Li, Meng; Li, Ying; Saxén, Henrik; He, Zhijun; Yu, Yaowei
Source:
Powder technology 2020 v.360 pp. 1337-1347
ISSN:
0032-5910
Subject:
permeability,   etc   ; porosity; powders;     Show all 3 Subjects
Abstract:
... Porosity is an important parameter to reflect the internal structure of the heap, and it is related to the permeability of a packed bed. Thus, understanding and further adjusting the porosity distribution will help to control the gas-solid reaction in a chemical reactor. In this work, sandpiles formed by ternary size particles with variable mass ratio were researched by discrete element method. Th ...
DOI:
10.1016/j.powtec.2019.11.017

2. Porogens and porogen selection in the preparation of porous polymer monoliths

Author:
Mansour, Fotouh R.; Waheed, Sidra; Paull, Brett; Maya, Fernando
Source:
Journal of separation science 2020 v.43 no.1 pp. 56-69
ISSN:
1615-9306
Subject:
permeability,   etc   ; polymers; porosity;     Show all 3 Subjects
Abstract:
... Porogens are key components required for the preparation of porous polymer monoliths for application in separation science. Porogens determine the stability, selectivity, and permeability of polymer monoliths. This review summarizes the role of porogens in the preparation of porous polymer monoliths with a focus on clear understanding of effect of porogens on morphological properties, porosity, su ...
DOI:
10.1002/jssc.201900876

3. A rhodol-enone dye platform with dual reaction triggers for specific detection of Cys

Author:
Hu, Linan; Chen, Zhu; Yu, Cheng; Zhang, Jie; Zhang, Hailiang; Xu, Pengfei; Xiao, Enhua
Source:
Journal of materials chemistry B 2020 v.8 no.12 pp. 2438-2442
ISSN:
2050-7518
Subject:
permeability,   etc   ; chemistry; cysteine; dyes; thiols;     Show all 5 Subjects
Abstract:
... Cys is a common and important sulfur-containing amino acid in living organisms, whose intracellular level changes are associated with a variety of diseases. In order to specifically detect Cys without interference from other thiol species, we have developed a rhodol-enone dye platform (termed as probe BL-C) with an acrylate group and an α,β-unsaturated ketone as bis-reaction-triggers. Our probe BL ...
DOI:
10.1039/c9tb02794g

4. Optimizing design and employing permeability differences to achieve flow confinement in devices for spatial multidimensional liquid chromatography

Author:
Adamopoulou, Theodora; Deridder, Sander; Bos, Tijmen S.; Nawada, Suhas; Desmet, Gert; Schoenmakers, Peter J.
Source:
Journal of chromatography 2020 v.1612 pp. 460665
ISSN:
0021-9673
Subject:
permeability,   etc   ; fluid mechanics; liquid chromatography;     Show all 3 Subjects
Abstract:
... In spatial multi-dimensional liquid chromatography (LC) devices the flow of each dimension has to remain in the corresponding region, otherwise the separation efficiency is undermined. Adequate flow-confinement measures are necessary. Here, the use of permeability differences across different compartments of spatial two-dimensional (2D) and three-dimensional (3D) LC devices as a method to guide fl ...
DOI:
10.1016/j.chroma.2019.460665

5. Lipid modulated trafficking in plants

Author:
Kachroo, Pradeep; Kachroo, Aardra
Source:
Molecular plant 2020
ISSN:
1674-2052
Subject:
permeability,   etc   ; plasmodesmata; proteins; sphingolipids; sterols;     Show all 5 Subjects
Abstract:
... Scientific progress in recent years has significantly unraveled several unique structural and functional aspects of the plasmodesmata (PD), such as demonstrating the presence of detergent-insoluble membrane microdomains enriched in sterols and sphingolipids. A recent study now shows that one of the sphingolipids, t18:0 phytoshinganine, binds to PD localizing protein (PDLP) 5 and increases retentio ...
DOI:
10.1016/j.molp.2020.01.012

6. Capillary imbibition in open-cell monodisperse foams

Author:
Pitois, Olivier; Kaddami, Asmaa; Langlois, Vincent
Source:
Journal of colloid and interface science 2020 v.571 pp. 166-173
ISSN:
0021-9797
Subject:
permeability,   etc   ; foams; imbibition; industrial applications; porosity;     Show all 5 Subjects
Abstract:
... Hypothesis: Although capillary imbibition of solid foams is involved in many industrial applications, general theory for capillary imbibition has never been proved to apply for this specific class of porous materials.Experiments: In order to compare accurately experiment and theory we produce solid foam samples with monodisperse pore size distributions and tunable pore volume fraction, and we meas ...
DOI:
10.1016/j.jcis.2020.03.013

7. A new determination method for the permeability tensor of fractured rock masses

Author:
Zheng, Jun; Wang, Xiaohong; Lü, Qing; Sun, Hongyue; Guo, Jichao
Source:
Journal of hydrology 2020 v.585 pp. 124811
ISSN:
0022-1694
Subject:
permeability,   etc   ; analytical methods; anisotropy; engineering; hydrology; models;     Show all 6 Subjects
Abstract:
... Hydraulic characteristics are important fundamental properties of fractured rock masses and involve various geoscience and engineering disciplines. The determination of the permeability tensor is the basic input of the equivalent continuum (EC) model for hydraulic behavior analysis. An analytical method to determine the permeability tensor of fractured rock masses is developed based on the orienta ...
DOI:
10.1016/j.jhydrol.2020.124811

8. Investigation on matching relationship and plugging mechanism of self-adaptive micro-gel (SMG) as a profile control and oil displacement agent

Author:
Chen, Xin; Li, Yiqiang; Liu, ZheYu; Zhang, Jian; Chen, Cheng; Ma, Ming
Source:
Powder technology 2020 v.364 pp. 774-784
ISSN:
0032-5910
Subject:
permeability,   etc   ; hydrodynamics; microgels; oils; particle size; powders;     Show all 6 Subjects
Abstract:
... Heterogeneity is well known to reduce sweep efficiency during oil development processes. Self-adaptive micro gel (SMG) as a agent for in-depth profile control is significantly limited to strict matching between complicated pore structure and particle size. A new matching factor considering size and distribution of particle and pore is presented to study the relationship of SMG and cores. The resis ...
DOI:
10.1016/j.powtec.2020.02.027

9. Evolution characteristics of reservoir parameters during coalbed methane drainage via in-seam horizontal boreholes

Author:
Li, Qixian; Xu, Jiang; Yan, Fazhi; Peng, Shoujian; Zhang, Chaolin; Zhang, Xiaolei
Source:
Powder technology 2020 v.362 pp. 591-603
ISSN:
0032-5910
Subject:
permeability,   etc   ; coalbed methane; drainage; gas emissions; shrinkage;     Show all 5 Subjects
Abstract:
... In-seam horizontal boreholes are used to collect coalbed methane (CBM). Physical simulations of CBM drainage by in-seam horizontal boreholes are conducted. The evolution of gas pressure and permeability ratio indicate a rapid decline in a short time. As time goes by, the permeability ratio recovers, and the gas pressure declines slowly. In the borehole area, initially, the decline rates of the gas ...
DOI:
10.1016/j.powtec.2019.11.104

10. Effect of fluid slippage on eddy growth and non-Darcian flow in rock fractures

Author:
Zhou, Jia-Qing; Wang, Lichun; Li, Changdong; Tang, Huiming; Wang, Liangqing
Source:
Journal of hydrology 2020 v.581 pp. 124440
ISSN:
0022-1694
Subject:
permeability,   etc   ; carbon sequestration; hydrology; oils; pollution; remediation;     Show all 6 Subjects
Abstract:
... Fluid flow in rock fractures is usually theoretically and numerically investigated on the premise of no-slip boundary condition (BC). However, fluid slippage at rock surface is naturally present in some circumstances that might lead to a violation of no-slip BC. How and to what extent slip BC affects non-Darcian fracture flow remains poorly constrained. This study systematically investigated the s ...
DOI:
10.1016/j.jhydrol.2019.124440

11. Impact of layered heterogeneity on transient saltwater upconing in coastal aquifers

Author:
Abdoulhalik, Antoifi; Abdelgawad, Abdelrahman M.; Ahmed, Ashraf A.
Source:
Journal of hydrology 2020 v.581 pp. 124393
ISSN:
0022-1694
Subject:
permeability,   etc   ; aquifers; hydraulic conductivity; saline water;     Show all 4 Subjects
Abstract:
... This research investigated the effect of layered heterogeneity on transient saltwater upconing in a laboratory-scale coastal aquifer. The experiments were conducted in a 2D-laboratory flow tank, and the response of the saltwater wedge to pumping was analysed in a heterogeneous aquifer system, where a low permeability layer was constructed in the middle of the aquifer. The SEAWAT code was used for ...
DOI:
10.1016/j.jhydrol.2019.124393

12. Magnetic vortex core-shell Fe3O4@C nanorings with enhanced microwave absorption performance

Author:
Wang, Xiao; Pan, Fei; Xiang, Zhen; Zeng, Qingwen; Pei, Ke; Che, Renchao; Lu, Wei
Source:
Carbon 2020 v.157 pp. 130-139
ISSN:
0008-6223
Subject:
permeability,   etc   ; carbon; holography; iron oxides; magnetism;     Show all 5 Subjects
Abstract:
... Fabricating microwave absorbers (MA) with strong attenuation capability and lightweight is still a challenge problem, which limit their further applications in our daily life. Herein, magnetic vortex core-shell Fe3O4@C nanorings (FNR-C) with excellent microwave absorption property have been successfully prepared by a facile strategy. Electron holography analysis is carried out to detect the magnet ...
DOI:
10.1016/j.carbon.2019.10.030

13. Influence of biopolymer on gas permeability in compacted clay at different densities and water contents

Author:
Ng, C.W.W.; So, P.S.; Lau, S.Y.; Zhou, C.; Coo, J.L.; Ni, J.J.
Source:
Engineering geology 2020 v.272 pp. 105631
ISSN:
0013-7952
Subject:
permeability; soil permeability,   etc   ; biopolymers; clay; colloids; landfills; mercury; permeameters; porosimetry; soil micromorphology; statistical analysis; water content;     Show all 12 Subjects
Abstract:
... Reducing soil permeability by natural biopolymers, which absorb water to form viscous hydrated colloids, may sustainably improve earthen structures such as landfill covers. Previous studies mainly investigated biopolymer effects on water permeability of saturated soils. However, performance of biopolymers in unsaturated soil is unclear, especially for gas permeability. This study examined effects ...
DOI:
10.1016/j.enggeo.2020.105631

14. Nonlinear drainage model of viscoelastic aquitards considering non-Darcian flow

Author:
Li, Jiong; Xia, Xiao-He; Li, Ming-Guang; Chen, Jin-Jian; Zhan, Hongbin
Source:
Journal of hydrology 2020 v.587 pp. 124988
ISSN:
0022-1694
Subject:
permeability,   etc   ; compressibility; drainage; hydraulic conductivity; models; subsidence; viscoelasticity;     Show all 7 Subjects
Abstract:
... Numerous aquitard drainage models for dewatering-induced land subsidence have been proposed in the past. Most of them are based on one or more of the following assumptions, including the validity of Darcy's law, neglect of rheological nature and constant soil properties. However, these assumptions may fail to reflect actual characteristics of viscoelastic aquitards. For this reason, the present st ...
DOI:
10.1016/j.jhydrol.2020.124988

15. Thermal performance analysis of a porous solar cavity receiver

Author:
Chen, Sheng; Li, Wenhao; Yan, Fuwu
Source:
Renewable energy 2020 v.156 pp. 558-569
ISSN:
0960-1481
Subject:
permeability,   etc   ; solar collectors; solar energy; solar farms; thermal conductivity;     Show all 5 Subjects
Abstract:
... A solar cavity receiver filled with a porous layer now is popularly found in solar energy industry. As its thermal performance will influence the efficiency of solar energy utilization systems considerably, deep understanding on it is urgent for the development of solar energy industry. In the present work, the influences of thickness, effective thermal conductivity and permeability of a porous la ...
DOI:
10.1016/j.renene.2020.04.077

16. Unravelling transport in complex natural fractures with fractal geometry: A comprehensive review and new insights

Author:
Babadagli, T.
Source:
Journal of hydrology 2020 v.587 pp. 124937
ISSN:
0022-1694
Subject:
permeability,   etc   ; anisotropy; fractal dimensions; hydrology; mathematical theory; models;     Show all 6 Subjects
Abstract:
... Quantitatively describing complex natural systems and their processes is a challenging task; additionally, the random nature of these processes adds more difficulty to this problem. This paper considers fracture networks as a system and the concepts of percolation theory and fractal geometry are combined to define the conductivity characteristics of such structures. Correlations between fracture n ...
DOI:
10.1016/j.jhydrol.2020.124937

17. In soil radon anomalies and volcanic activity on Mt. Etna (Italy)

Author:
İçhedef, M.; Giammanco, S.; Neri, M.; Catalano, R.; Immé, G.; Morelli, D.; Muré, F.; Giudice, N.
Source:
Journal of environmental radioactivity 2020 v.218 pp. 106267
ISSN:
0265-931X
Subject:
permeability,   etc   ; earthquakes; radioactivity; radon; rocks; soil air; volcanic activity; Italy;     Show all 8 Subjects
Abstract:
... We present here the first attempt to understand the fast dynamics of an active basaltic volcano, namely Mt. Etna using soil gas radon measured in some sites located in strategic places around the volcano. Data were measured continuously from July 2015 to February 2017 and the raw signals were treated in order to filter out all possible periodic components that are normally due to non-volcanic fact ...
DOI:
10.1016/j.jenvrad.2020.106267

18. Compression and consolidation behaviors of lime-treated dredging slurry under vacuum pressure

Author:
Sun, Hong-lei; Weng, Zhen-qi; Liu, Si-jie; Geng, Xue-yu; Pan, Xiao-dong; Cai, Yuan-qiang; Shi, Li
Source:
Engineering geology 2020 v.270 pp. 105573
ISSN:
0013-7952
Subject:
soil permeability,   etc   ; laboratory experimentation; mechanical properties; models; risk reduction; slurries;     Show all 6 Subjects
Abstract:
... Dredging slurry is treated by a combination of lime treatment and vacuum preloading. However, the mechanical characteristics and consolidation mechanics of lime-treated slurry under vacuum loading is not fully understood, making it difficult to predict slurry settlement. In this study, we develop a laboratory model of lime-treated slurry and subject it to vacuum preloading to investigate the compr ...
DOI:
10.1016/j.enggeo.2020.105573

19. Synergetic mechanism of fracture properties and system configuration on techno-economic performance of enhanced geothermal system for power generation during life cycle

Author:
Meng, Nan; Li, Tailu; Wang, Jianqiang; Jia, Yanan; Liu, Qinghua; Qin, Haosen
Source:
Renewable energy 2020 v.152 pp. 910-924
ISSN:
0960-1481
Subject:
permeability,   etc   ; electricity; evaporation; geothermal energy; power generation; temperature;     Show all 6 Subjects
Abstract:
... Enhanced geothermal system is one of the most commonly used geothermal power generation systems for hot dry rock. In order to illuminate the life cycle performance, the fracture spacing is coupled with cycle configuration in this study. The typical fracture properties and three enhanced geothermal system configurations are considered, the optimal operating conditions of each system in different pe ...
DOI:
10.1016/j.renene.2020.01.098

20. Uplift pressure and hydraulic gradient in Sabalan Dam

Author:
Norouzi, Reza; Salmasi, Farzin; Arvanaghi, Hadi
Source:
Applied water science 2020 v.10 no.5 pp. 111
ISSN:
2190-5487
Subject:
permeability,   etc   ; clay; computer software; finite element analysis; seepage;     Show all 5 Subjects
Abstract:
... The present study investigates the effects of clay core thickness and cutoff wall depth on some of the design parameters in the Sabalan rock fill dam by the finite-element method using the SEEP/W software. Clay cores with various thicknesses and cutoff walls in different situations of dam foundations were tested. The results revealed that (1) the maximum hydraulic gradient in Sabalan dam foundatio ...
DOI:
10.1007/s13201-020-01195-2