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1. Concentration polarization over reverse osmosis membranes with engineered surface features

Author:
Zhou, Zuo; Ling, Bowen; Battiato, Ilenia; Husson, Scott M.; Ladner, David A.
Source:
Journal of membrane science 2021 v.617 pp. 118199
ISSN:
0376-7388
Subject:
shear stress,   etc   ; artificial membranes; fouling; hydrodynamics; laminar flow; mass transfer; mathematical models; mixing; reverse osmosis; roughness; solutes; surface area; valleys;     Show all 13 Subjects
Abstract:
... Creating membranes with engineered surface features has been shown to reduce membrane fouling and increase flux. Surface feature patterns can be created by several means, such as thermal embossing with hard stamps, template-based micromolding, and printing. It has been proposed that the patterns create enhanced mixing and irregular fluid flow that increases mass transfer of solutes away from the m ...
DOI:
10.1016/j.memsci.2020.118199

2. Experimental investigation on bed shear stress distribution in the roughened compound channel

Author:
Abbaspour, Akram
Source:
Applied water science 2020 v.10 no.3 pp. 87
ISSN:
2190-5487
Subject:
shear stress,   etc   ; floodplains; roughness;     Show all 3 Subjects
Abstract:
... The roughness in the floodplains in a compound canal and its impact on hydraulic parameters such as the shear stress and their estimation are one of the problems that have attracted the attention of engineers. In this research, the aim is to investigate the effect of artificial on the floodplain of the compound channel on hydraulic parameters. In experiments, slope of channel bed was 0.0015 and th ...
DOI:
10.1007/s13201-020-1161-z

3. High electrorheological effect in Bi1.8Fe1.2SbO7 suspensions

Author:
Egorysheva, A.V.; Kraev, A.S.; Gajtko, O.M.; Kusova, T.V.; Baranchikov, A.E.; Agafonov, A.V.; Ivanov, V.K.
Source:
Powder technology 2020 v.360 pp. 96-103
ISSN:
0032-5910
Subject:
shear stress,   etc   ; dielectric permittivity; powders;     Show all 3 Subjects
Abstract:
... We report on the first experimental evidence of the electrorheological effect in suspensions of superfine pyrochlore-type Bi₁.₈Fe₁.₂SbO₇ powders. Tensile-compressive and shear stress studies of the electrorheological fluids, with various filler contents, revealed an exceptionally high electrorheological effect in the materials – the tensile yield strength at 5kV/mm reached about 20kPa. The frequen ...
DOI:
10.1016/j.powtec.2019.10.027

4. Response to comments on “A comparison of different physical stomach models and an analysis of shear stresses and strains in these system” by Wu and Chen (2020)

Author:
Zhong, Chao; Langrish, Timothy
Source:
Food research international 2020 v.137 pp. 109442
ISSN:
0963-9969
Subject:
shear stress,   etc   ; humans; hydrodynamics; manufacturing; models; stomach;     Show all 6 Subjects
Abstract:
... Physical stomach (in-vitro) models have considerable potential for answering questions about the dissolution and delivery of tablets, as well as answering fundamental questions about the hydrodynamics of the stomach and ultimately investigating diseases of the human gastrointestinal system. Physical gastrointestinal models have been compared in terms of their advantages and disadvantages. The stru ...
DOI:
10.1016/j.foodres.2020.109442

5. A comparison of different physical stomach models and an analysis of shear stresses and strains in these system

Author:
Zhong, Chao; Langrish, Timothy
Source:
Food research international 2020 v.135 pp. 109296
ISSN:
0963-9969
Subject:
shear stress,   etc   ; humans; hydrodynamics; models; pH; stomach;     Show all 6 Subjects
Abstract:
... In this study, typical stomach characteristics, including the Migrating Motility Complex (MMC) and fed contractile pattern, have been summarised. The pH changes and enzyme degradation are discussed. Physical gastrointestinal models have been compared in terms of their advantages and disadvantages. The structures of the produced stomach parts are compared among the in-vitro models. Mathematical fea ...
DOI:
10.1016/j.foodres.2020.109296

6. Extracellular blebs: Artificially-induced extracellular vesicles for facile production and clinical translation

Author:
Thone, Melissa N.; Kwon, Young Jik
Source:
Methods 2020 v.177 pp. 135-145
ISSN:
1046-2023
Subject:
shear stress,   etc   ; extrusion; precision medicine; proteins;     Show all 4 Subjects
Abstract:
... Extracellular vesicles (EVs) have emerged as promising biologic and comprehensive therapies for precision medicine. Despite their potential demonstrated at the benchtop, few EV formulations have made it to the clinic due to challenges in regulatory compliant scalable production; including purity, homogeneity, and reproducibility. For translation of this technology, there is a strong need for novel ...
DOI:
10.1016/j.ymeth.2019.11.007

7. Granules abrasion cause deterioration of nitritation in a mainstream granular sludge reactor with high loading rate

Author:
Liu, Wenru; Yin, Fangfang; Yang, Dianhai
Source:
Chemosphere 2020 v.243 pp. 125433
ISSN:
0045-6535
Subject:
shear stress,   etc   ; air; biomass; granules; nitrification; sludge;     Show all 6 Subjects
Abstract:
... Biomass detachment generally occurred in granular sludge systems. However, little is known about the influence of biomass detachment on the granules performing nitritation. Here, a granular sludge reactor with high loading rates (6.8 ± 0.4 kg N·m⁻³·d⁻¹) was achieved at mainstream conditions. Though the low ratio control strategy was maintained, the deterioration of nitritation performance was obse ...
DOI:
10.1016/j.chemosphere.2019.125433

8. Investigation on solid-liquid transition of soft mud under steady and oscillatory shear loads

Author:
Nie, Sihang; Jiang, Qin; Cui, Li; Zhang, Changkuan
Source:
Sedimentary geology 2020 v.397 pp. 105570
ISSN:
0037-0738
Subject:
shear stress,   etc   ; geology; phase transition; rheological properties;     Show all 4 Subjects
Abstract:
... An experimental study on the rheological properties of soft mud under steady and oscillatory shear was conducted. The phenomenon of solid-liquid transition is clarified by steady-state and dynamic tests. With an increase of shear load magnitude, the rheological property of soft mud could be classified into three stages: solid stage, solid-liquid transition stage, and liquid stage. This transition ...
DOI:
10.1016/j.sedgeo.2019.105570

9. Turbulent-Resistance Model for Organized Rough Walls

Author:
Li, Zhuoqun
Source:
Boundary-layer meteorology 2020 v.174 no.3 pp. 393-410
ISSN:
0006-8314
Subject:
shear stress,   etc   ; geometry; model validation; models; roughness;     Show all 5 Subjects
Abstract:
... A resistance model for organized rough walls of varying geometry in fully-developed turbulent boundary layers is proposed. For a given flow, the shear stress on rough walls varies with the surface geometry. The model normalizes the roughness shear stress by its theoretical maximum. Based on an analysis of measurable drag on individual roughness elements, the expression for the normalized roughness ...
DOI:
10.1007/s10546-019-00489-6

10. Pore-scale visualization and characterization of viscous dissipation in porous media

Author:
Roman, Sophie; Soulaine, Cyprien; Kovscek, Anthony R.
Source:
Journal of colloid and interface science 2020 v.558 pp. 269-279
ISSN:
0021-9797
Subject:
shear stress,   etc   ; momentum; oils; porous media; viscosity;     Show all 5 Subjects
Abstract:
... The effects of mutual transfer of momentum between two immiscible flowing fluids in porous media are not well understood nor predictable yet. From considerations at the pore-scale, it should be possible to determine whether and to what extent interfacial viscous coupling effects are significant.We visualize the velocity distributions inside immobile globules of wetting phase (water) while a non-we ...
DOI:
10.1016/j.jcis.2019.09.072

11. Prediction of apparent shear stress in an asymmetric compound channel

Author:
Devi, Kamalini; Khatua, Kishanjit Kumar
Source:
ISH journal of hydraulic engineering 2020 v.26 no.1 pp. 1-11
ISSN:
2164-3040
Subject:
shear stress,   etc   ; floodplains; models; momentum; prediction; rivers;     Show all 6 Subjects
Abstract:
... There is always an exchange of momentum between the deep main channel and its shallow floodplains of a compound channel section. When rivers have single side floodplains, they are known as asymmetric compound channels. Momentum transfer phenomenon has the effect of increasing floodplain shear and decreasing the main channel shear. In symmetrical compound channels, the momentum transfer occurs from ...
DOI:
10.1080/09715010.2018.1429326

12. Duration of load behaviour of a glued shear plate dowel joint

Author:
Larsson, Gustaf; Gustafsson, Per Johan; Serrano, Erik; Crocetti, Roberto
Source:
European journal of wood and wood products 2020 v.78 no.1 pp. 5-15
ISSN:
0018-3768
Subject:
shear stress,   etc   ; climate; deformation; dowelled joints; steel;     Show all 5 Subjects
Abstract:
... An experimental study on the duration of load effects in a glued shear plate dowel joint was conducted. The joint design features a single large diameter dowel for load transfers between members, via external steel plates, which are bonded to the timber with a low stiffness bond line. Due to the low bond line stiffness, the timber element is subjected to a close to uniform shear stress distributio ...
DOI:
10.1007/s00107-019-01474-z

13. Flow pattern study in Beshar River and its two straight and meander reaches using CCHE2D model

Author:
Salmasi, Farzin; Ayaseh, Ahmad; Dalir, Ali Hoseinzadeh; Arvanaghi, Hadi
Source:
Applied water science 2020 v.10 no.1 pp. 19
ISSN:
2190-5487
Subject:
shear stress,   etc   ; latitude; models; rivers; roughness;     Show all 5 Subjects
Abstract:
... In this study, flow pattern in Beshar River as a main branch of Karoon River has been analyzed using CCHE2D. For this purpose, a 12-km reach upstream of Shahmokhtar hydrometric station near Yasuj city was considered. The CCHE2D model was calibrated using different Manning’s roughness coefficients and different turbulent models; for this purpose, numerical results were compared with observation dat ...
DOI:
10.1007/s13201-019-1107-5

14. Synthetic slip plane, a hybrid kind of calcite twin data in dynamic analysis

Author:
Shan, Yehua; Zheng, Jian; Liang, Xinquan
Source:
MethodsX 2019 v.6 pp. 322-328
ISSN:
2215-0161
Subject:
shear stress,   etc   ; calcite; equations;     Show all 3 Subjects
Abstract:
... This paper defines a synthetic slip plane as the linear combination of a pair of twinned and untwinned e-planes in a single calcite crystal. This auxiliary slip plane is dependent upon neither the twinned e-plane nor the untwinned e-plane. It can be used together with the twinned e-plane either to further constrain the extents of the compression and tension axes in graphic dynamic analysis or to b ...
DOI:
10.1016/j.mex.2019.02.004
PubMed:
30834198
PubMed Central:
PMC6384318

15. Nebkha alignments and their implications for shadow dune elongation under unimodal wind regime

Author:
Zhao, Yongcheng; Gao, Xin; Lei, Jiaqiang; Li, Shengyu
Source:
Geomorphology 2020 v.365 pp. 107250
ISSN:
0169-555X
Subject:
shear stress,   etc   ; dunes; hydrodynamics; sand; wind speed; wind tunnels;     Show all 6 Subjects
Abstract:
... Compared with longer-crested linear dunes formed in the bimodal wind regime, little is known about the driving forces of linear dunes that elongate in the lee side of obstacles under a unimodal wind regime. Here, we present the flow dynamics and sand deposition patterns around the aligned nebkhas with different spacing distances (∆) based on computational fluid dynamics (CFD) simulation, wind tunn ...
DOI:
10.1016/j.geomorph.2020.107250

16. Experimental analysis and analytical modelling of the textile/matrix interface shear stress in textile reinforced cementitious matrix composites

Author:
Saidi, Mohamed; Gabor, Aron
Source:
Composites 2020 v.135 pp. 105961
ISSN:
1359-835X
Subject:
shear stress,   etc   ; composite materials; fabrics; fiber optics; models;     Show all 5 Subjects
Abstract:
... This research work focuses both on experimental analysis and the development of an analytical model of the shear stress distribution at the textile/matrix interface of Textile Reinforced Cementitious Matrix Composites (TRCMC) in tension.For the experimental part, distributed fibre optic sensing (DFOS) was used, embedded in the core of the TRCMC, allowing strain measurement with a millimetric spati ...
DOI:
10.1016/j.compositesa.2020.105961

17. Insight into indentation-induced plastic flow in austenitic stainless steel

Author:
Xia, Wenzhen; Dehm, Gerhard; Brinckmann, Steffen
Source:
Journal of materials science 2020 v.55 no.21 pp. 9095-9108
ISSN:
0022-2461
Subject:
shear stress,   etc   ; finite element analysis; plasticity; roughness; stainless steel;     Show all 5 Subjects
Abstract:
... The indentation-induced plasticity and roughness have been investigated intensively by experiments and simulations during the last decades. However, the precise mechanisms of how dislocation flow leads to pile-up formation are still not completely understood, although this is one of the initial steps causing surface roughening in tribological contacts at low loads. In this work, [Formula: see text ...
DOI:
10.1007/s10853-020-04646-y

18. SPH modelling of turbulent open channel flow over and within natural gravel beds with rough interfacial boundaries

Author:
Kazemi, Ehsan; Koll, Katinka; Tait, Simon; Shao, Songdong
Source:
Advances in water resources 2020 v.140 pp. 103557
ISSN:
0309-1708
Subject:
shear stress,   etc   ; gravel; hydrodynamics; models; roughness; turbulent flow; water resources;     Show all 7 Subjects
Abstract:
... Smoothed Particle Hydrodynamics (SPH) is brought to a level that can be applied to simulate turbulent open channel flows over and within natural porous gravel beds. For this, improvements have been made with regards to i) turbulence modelling, ii) open boundaries (inflow and outflow), and iii) treatment of the rough interface boundary between the porous bed and the overlying free-flow. Flow throug ...
DOI:
10.1016/j.advwatres.2020.103557

19. Analysis of screw feeding of faceted particles by discrete element method

Author:
López, Alejandro; Vivacqua, Vincenzino; Hammond, Robert; Ghadiri, Mojtaba
Source:
Powder technology 2020 v.367 pp. 474-486
ISSN:
0032-5910
Subject:
shear stress,   etc   ; cohesion; deformation; friction; mass flow; mathematical models; powders;     Show all 7 Subjects
Abstract:
... Reliable and consistent powder flow in screw feeders is of great interest to a wide range of industries, particularly for continuous manufacturing of pharmaceutical powders. However, analysis of flow of cohesive powders with sharp corners and edges, as commonly found in the case of crystalline solids, presents a great challenge due to complexity of shape and its influence on flow. In the present w ...
DOI:
10.1016/j.powtec.2020.03.064

20. Investigation of Rotating Vortex Rope formation during load variation in a Francis turbine draft tube

Author:
Sotoudeh, Nahale; Maddahian, Reza; Cervantes, Michel J.
Source:
Renewable energy 2020 v.151 pp. 238-254
ISSN:
0960-1481
Subject:
shear stress,   etc   ; blades; mathematical models; renewable energy sources; vanes;     Show all 5 Subjects
Abstract:
... Rotating Vortex Rope (RVR) has been a matter of focus for years due to the major effects on hydraulic turbine’s efficiency. The exact procedure of RVR formation is still vague. The present research focuses on the dynamics of the RVR formation during the load variation employing transient numerical simulations. Two different geometries including the full geometry and the reduced one, which consists ...
DOI:
10.1016/j.renene.2019.11.014