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Design flood of ungauged basins based on DEM

Zhang Ting,Feng Ping

Strategic Study of CAE 2011, Volume 13, Issue 12,   Pages 68-73

Abstract: been taken for example to discuss the method of design flood calculation by means of combining the DEMIn the convergence calculation, the isochrones are obtained by DEM which helps to avoid the cumbersome

Keywords： ungauged area     design flood     digital elevation model (DEM)     isochrones    

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Analysis of the Quality of Daily DEM Generation with Geosynchronous InSAR Article

Zefa Yang, Qingjun Zhang, Xiaoli Ding, Wu Chen

Engineering 2020, Volume 6, Issue 8,   Pages 913-918 doi: 10.1016/j.eng.2020.07.003

Abstract:

Up-to-date digital elevation model (DEM) products are essential in many fields such as hazards mitigationspace-borne interferometric synthetic aperture radar (InSAR) has been proven to be a valuable tool for DEMThis offers great potential for the daily DEM generation that is desirable yet thus far impossible withIn this work, we systematically analyze the quality of daily GEOSAR DEM.The results indicate that the accuracy of a daily GEOSAR DEM is generally much lower than what can be

Keywords： Daily digital elevation model     Interferometric synthetic aperture radar     Geosynchronous synthetic aperture radar     Accuracy analysis    

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Multiscale mechanical modeling of hydrated cement paste under tensile load using the combined DEM-MD

Yue HOU, Linbing WANG

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 3,   Pages 270-278 doi: 10.1007/s11709-017-0408-8

Abstract: In this paper, a combined DEM-MD method is proposed to simulate the crack failure process of Hydratedthree-dimensional (3D) multiscale mechanical model is established using the combined Discrete Element Method (DEMSimulation results show that the combined DEM-MD model is computationally efficient with good accuracy

Keywords： hydrated cement paste     multiscale     MD simulation     DEM    

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Magnetic-porous microspheres with synergistic catalytic activity of small-sized gold nanoparticles and titania matrix

Kadriye Özlem Hamaloğlu, Ebru Sağ, Çiğdem Kip, Erhan Şenlik, Berna Saraço

Frontiers of Chemical Science and Engineering 2019, Volume 13, Issue 3,   Pages 574-585 doi: 10.1007/s11705-019-1799-y

Abstract: Fe O nanoparticles immobilized on porous titania in micron-size range were decorated with small-sized gold nanoparticles and used as a plasmonic catalyst for the reduction of 4-nitrophenol. Monodisperse-porous magnetic titania microspheres were synthesized with bimodal pore-size distribution by the sol-gel templating method. Small-sized gold nanoparticles obtained by the Martin method were attached onto the aminated form of the magnetic titania microspheres. A significant enhancement in the catalytic activity was observed using the gold nanoparticle-decorated magnetic titania microspheres compared to gold nanoparticle-decorated magnetic silica microspheres because of the synergistic effect between small-sized gold nanoparticles and titania. The synergistic effect for gold nanoparticle-attached magnetic titania microspheres could be explained by surface plasmon resonance-induced transfer of hot electrons from gold nanoparticles to the conduction band of titania. Using the proposed catalyst, 4-nitrophenol could be converted to 4-aminophenol in an aqueous solution within 0.5 min. The 4-nitrophenol reduction rates were 2.5–79.3 times higher than those obtained with similar plasmonic catalysts. The selection of micron-size, magnetic, and porous titania microspheres as a support material for the immobilization of small-sized gold nanoparticles provided a recoverable plasmonic catalyst with high reduction ability.

Keywords： small-sized gold nanoparticles     magnetic titania microspheres     sol-gel template synthesis     plasmonic catalysis     4-nitrophenol    

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Design and analyses of open-ended pipe piles in cohesionless soils

Yuan GUO,Xiong (Bill) YU

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 1,   Pages 22-29 doi: 10.1007/s11709-016-0314-5

Abstract: To close the knowledge gap, discrete element method (DEM) was used to simulate the soil plugging processThe porosity distribution and particle contact force distribution from DEM model indicate a large stress

Keywords： open-ended pipe pile     soil plug     DEM     base capacity    

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On the applicability of different adhesion models in adhesive particulate flows

Guanqing LIU, Shuiqing LI, Qiang YAO,

Frontiers in Energy 2010, Volume 4, Issue 2,   Pages 280-286 doi: 10.1007/s11708-009-0062-5

Abstract: Finally, recent applications of adhesion models in discrete element method (DEM) investigations of fine-particle

Keywords： adhesive contact     van der Waals force     adhesion model     adhesion map     DEM    

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Strain localization analyses of idealized sands in biaxial tests by distinct element method

Mingjing JIANG, Hehua ZHU, Xiumei LI,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 2,   Pages 208-222 doi: 10.1007/s11709-010-0025-2

Abstract: strain localization of an idealized sand in biaxial compression tests using the distinct element method (DEMand distributions of void ratio, particle velocity, and the averaged pure rotation rate (APR) in the DEM

Keywords： idealized sand     strain localization     numerical analyses     distinct element method (DEM)    

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Influence mechanism of dynamic and static liquid bridge forces on particle deposition behaviors in solar photovoltaic mirrors

Xueqing LIU, Xiaodong ZHAO, Luyi LU, Jianlan LI

Frontiers in Energy 2021, Volume 15, Issue 2,   Pages 499-512 doi: 10.1007/s11708-021-0742-3

Abstract: Solar energy is one of the most promising forms of renewable energy for solving the energy crisis and environmental problems. Dust deposition on photovoltaic mirrors has a serious negative impact on the photoelectric conversion efficiency of solar power stations. In this paper, the influence mechanism of the dynamic and static liquid bridge forces on particle deposition behaviors on solar photovoltaic mirrors is investigated. In addition, the expression and physical meaning of the particle critical separation velocity are proposed. The research results show that the static liquid bridge force can be the primary deposition force causing dust particles to adhere to photovoltaic mirrors. However, the dynamic liquid bridge force can act as a resistance force for the particle motion process and even make dust particles roll along and finally stay on the mirror. The contact force is the primary separation force that causes dust particles to flow away from the mirror. Whether dust particles adhere to the mirror depends on the relative size of the deposition and separating forces. The particle critical separation velocity describes the relative size of the collision-rebound effect and mirror adhesion effect and is expressed in Eq. (16). These research findings can provide theoretical guidance for mirror cleaning methods in the operation process of photovoltaic mirrors.

Keywords： dust deposition     discrete element method (DEM)     photovoltaic mirrors     solar energy    

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Numerical simulation of two-dimensional spouted bed with draft plates by discrete element method

ZHAO Yongzhi, JIANG Maoqiang, CHENG Yi, JIN Yong

Frontiers of Chemical Science and Engineering 2008, Volume 2, Issue 1,   Pages 5-9 doi: 10.1007/s11705-008-0009-0

Abstract: A discrete element method (DEM)-computational fluid dynamics (CFD) two-way coupling method was employedThe motion of particles was modeled by the DEM and the gas flow was modeled by the Navier-Stokes equationThe motion of particles in the spouted bed with complex geometry was solved by combining DEM and boundaryThe minimal spouted velocity was obtained by the BEM-DEM-CFD simulation and the variation of the flow

Keywords： annulus     BEM-DEM-CFD simulation     gas-solid     two-dimensional     relationship    

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Discrete element method modeling of corn-shaped particle flow in rectangular hopper

He TAO, Baosheng JIN, Wenqi ZHONG, Xiaofang WANG,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 2,   Pages 267-275 doi: 10.1007/s11709-010-0035-0

Abstract: Discrete element method (DEM) was developed to simulate the corn-shaped particles flow in the hopper.

Keywords： discrete         element          method         (DEM)             non-spherical    

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Title Author Date Type Operation

Design flood of ungauged basins based on DEM

Zhang Ting,Feng Ping

Journal Article

Analysis of the Quality of Daily DEM Generation with Geosynchronous InSAR

Zefa Yang, Qingjun Zhang, Xiaoli Ding, Wu Chen

Journal Article

Multiscale mechanical modeling of hydrated cement paste under tensile load using the combined DEM-MD

Yue HOU, Linbing WANG

Journal Article

Magnetic-porous microspheres with synergistic catalytic activity of small-sized gold nanoparticles and titania matrix

Kadriye Özlem Hamaloğlu, Ebru Sağ, Çiğdem Kip, Erhan Şenlik, Berna Saraço

Journal Article

Design and analyses of open-ended pipe piles in cohesionless soils

Yuan GUO,Xiong (Bill) YU

Journal Article

On the applicability of different adhesion models in adhesive particulate flows

Guanqing LIU, Shuiqing LI, Qiang YAO,

Journal Article

Strain localization analyses of idealized sands in biaxial tests by distinct element method

Mingjing JIANG, Hehua ZHU, Xiumei LI,

Journal Article

Influence mechanism of dynamic and static liquid bridge forces on particle deposition behaviors in solar photovoltaic mirrors

Xueqing LIU, Xiaodong ZHAO, Luyi LU, Jianlan LI

Journal Article

Numerical simulation of two-dimensional spouted bed with draft plates by discrete element method

ZHAO Yongzhi, JIANG Maoqiang, CHENG Yi, JIN Yong

Journal Article

Discrete element method modeling of corn-shaped particle flow in rectangular hopper

He TAO, Baosheng JIN, Wenqi ZHONG, Xiaofang WANG,

Journal Article