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Impact of inter-particle collision on elbow erosion based on DSMC-CFD method

Petroleum Science 2021年第3期18卷 909-922页

作者： Xiao-Yang Sun Xue-Wen Cao College of Pipeline and Civil Engineering China University of PetroleumQingdao 266580China

In this work,computational fuid dynamics(CFD)is used to study elbow erosion due to a gas-solid two-phase *** particular,the direct simulation Monte Carlo(DSMC)method is used to study the impact of inter-particle collision on the erosion *** two-way coupled Euler-Lagrange method is used to solve the gas-solid fow,and the DSMC method is used to consider the collision behavior between *** efects of key factors,such as the particle concentration distribution and inter-particle collision,on the erosion ratio are evaluated and *** efectiveness of the method is verifed from experimental *** results show that the inter-particle collision signifcantly infuences the particle movement path and erosion *** the inter-particle collision is considered,the maximum erosion position is *** erosion model proposed by Oka et al.,who used the DSMC method,agrees best with the experimental data,and the average percentage error decreases from 39.2 to 27.4%.

关键词： Elbow CFD DSMC Solid particle erosion inter-particle collision

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Gas-solid flow in a diffuser:Effect of inter-particle and particle-wall collisions

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Particuology 2021年第4期19卷 187-200页

作者： Santosh Kumar Senapati Sukanta K.Dash CFD Laboratory Department of Mechanical EngineeringIndian Institute of Technology KharagpurWest Bengal721302India

This article investigates the role of the specularity coefficient(φ,the extent of the energy dissipation due to particle-wall collisions),inter-particle restitution coefficient(e_(pp),the extent of the energy dissipation due to inter-particle collisions),and four combinations of these variables on the hydrodynamics,and the pressure recovery of the dilute gas-solid suspension in a *** investigation applies the two-fluid modeling approach along with the kinetic theory of the granular *** present investigation’s findings indicate that an increase inφor a reduction in e_(pp) reduces the pressure recovery by weakening the reverse momentum transfer phenomenon,which is recognized as the primary means for the pressure ***,in a gas-solid flow system,a higherφor smaller e_(pp) enhances the particles’trapping in the recirculation *** recirculation zone’s strength and size increase asφincreases or e_(pp) ***,an increase in the wall-particle and inter-particle interactions strengthens the sidewise displacement of the *** effect of the wall-particle and inter-particle interactions are insignificant for extremely small solid loading.

关键词： Gas-solid flow Diffuser particle-wall collision inter-particle collision Pressure recovery Reattachment length

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AModeling Study on particleDispersion inWall-Bounded Turbulent Flows

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Advances in Applied Mathematics and Mechanics 2014年第6期6卷 764-782页

作者： Jian-Hung Lin Keh-Chin Chang Department of Aeronautics and Astronautics National Cheng Kung UniversityNo.1University RdTainan 701Taiwan

Three physicalmechanismswhichmay affect dispersion of particle’smotion in wall-bounded turbulent flows,including the effects of turbulence,wall roughness in particle-wall collisions,and inter-particle collisions,are numerically investigated in this *** studies with differentwall roughness extents and with different mass loading ratios of particles are performed in fully developed channel flows with the Eulerian-Lagrangian approach.A low-Reynolds-number k−ǫturbulence model is applied for the solution of the carrier-flow field,while the deterministic Lagrangian method together with binary-collision hard-sphere model is applied for the solution of particle *** is shown that the mechanism of inter-particle collisions should be taken into account in the modeling except for the flows laden with sufficiently low mass loading ratios of *** of wall roughness on particle dispersion due to particle-wall collisions are found to be considerable in the bounded particleladen *** the investigated particles are associated with large Stokes numbers,i.e.,larger than O(1),in the test problem,the effects of turbulence on particle dispersion aremuch less considerable,as expected,in comparison with another two physical mechanisms investigated in the study.

关键词： particle-laden flow turbulent dispersion inter-particle collision particle-wall collision.

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A NEW NUMERICAL METHOD FOR DENSE particle LADEN JETS

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Journal of Hydrodynamics 1998年第1期10卷 109-118页

作者： Sun Ping, Xia Zhen-hai, Fan Jian-ren, Cen Ke-faDepartment of Energy Engineering, Zhejiang University, Hangzhou 310027,P. R. China

A new model that combines Eulerian and Lagrangian approach is set up. with inter-particle interaction being taken account of through kinetic theory. The numerical algorithm is included. In the end, comparison with the... 详细信息

关键词： Eulerian approach Lagrangian approach inter-particle collision

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