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NUMERICAL STUDY OF PARTICLE DISTRIBUTION IN WAKE OF LIQUID-PARTICLE FLOWS PAST A CIRCULAR CYLINDER USING DISCRETE VORTEX METHOD 被引量:1
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作者 黄远东 吴文权 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2006年第4期535-542,共8页
Particle-laden water flows past a circular cylinder were numerically investigated. The discrete vortex method (DVM) was employed to evaluate the unsteady water flow fields and a Lagrangian approach was applied for t... Particle-laden water flows past a circular cylinder were numerically investigated. The discrete vortex method (DVM) was employed to evaluate the unsteady water flow fields and a Lagrangian approach was applied for tracking individual solid particles. A dispersion function was defined to represent the dispersion scale of the particle. The wake vortex patterns, the distributions and the time series of dispersion functions of particles with different Stokes numbers were obtained. Numerical results show that the particle distribution in the wake of the circular cylinder is closely related to the particle's Stokes number and the structure of wake vortices: (1) the intermediate sized particles with Stokes numbers, St, of 0.25, 1.0 and 4.0 can not enter the vortex cores and concen- trate near the peripheries of the vortex structures, (2) in the circular cylinder wake, the dispersion intensity of particles decreases as St is increased from 0.25 to 4.0. 展开更多
关键词 liquid-particle high Reynolds number discrete vortex method (DVM) wake vortex particle dispersion
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THE TURBULENT MODEL OF LIQUID-PARTICLE FLOWS AND ITS APPLICATION TO NUMERICAL PREDICTION OF OIL POLLUTION
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作者 Shen Yong-ming Zhao Wen-qian, Dalian University of Technology, Dalian 116023, P. R. China 《Journal of Hydrodynamics》 SCIE EI CSCD 1992年第2期72-78,共7页
Simulation of particle turbulent transport in present mathematical models of two- phase turbulent flows is algebraic model based on local following theory. The predicted results by these models are not consistent with... Simulation of particle turbulent transport in present mathematical models of two- phase turbulent flows is algebraic model based on local following theory. The predicted results by these models are not consistent with that of experiments available. The motion of two-phase flow is described by a unified model of multi-fluid in this paper. The two-fluid turbulent model of two-phase flow based on k-e equations for particles and fluid, and corresponding numerical thch- nique are both developed. The proposed model and the numerical technique are successfully em- ployed to numerical modelling for oil-water two-phase turbulent recirculating flow. 展开更多
关键词 liquid-particle flows particle turbulence oil pollution
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Computational fluid dynamics-discrete element method simulation of stirred tank reactor for graphene production 被引量:1
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作者 Shuaishuai Zhou Jing Li +5 位作者 Kaixiang Pang Chunxi Lu Feng Zhu Congzhen Qiao Yajie Tian Jingwei Zhang 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2023年第12期196-207,共12页
Liquid phase exfoliation(LPE)process for graphene production is usually carried out in stirred tank reactor and the interactions between the solvent and the graphite particles are important as to improve the productio... Liquid phase exfoliation(LPE)process for graphene production is usually carried out in stirred tank reactor and the interactions between the solvent and the graphite particles are important as to improve the production efficiency.In this paper,these interactions were revealed by computational fluid dynamics–discrete element method(CFD-DEM)method.Based on simulation results,both liquid phase flow hydrodynamics and particle motion behavior have been analyzed,which gave the general information of the multiphase flow behavior inside the stirred tank reactor as to graphene production.By calculating the threshold at the beginning of graphite exfoliation process,the shear force from the slip velocity was determined as the active force.These results can support the optimization of the graphene production process. 展开更多
关键词 Computational fluid dynamics Discrete element method Stirred tank LPE process liquid-particle interactions
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