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Large-eddy simulation of turbulent preferential concentration and collision of bidisperse heavy particles in isotropic turbulence
Chen JC(陈进财); Jin GD(晋国栋); Jin, GD (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
Source PublicationPOWDER TECHNOLOGY
2017-06-01
Volume314Pages:281-290
ISSN0032-5910
AbstractParticle-laden turbulent flows are ubiquitous in natural and engineering flows. The preferential concentration and pair-statistics of heavy particles at small and intermediate Stokes numbers are mainly related to the small-scale motions which are missing in conventional large-eddy simulation (LES). Therefore studies on the effects of subgrid scale (SGS) motions on particle-pair statistics are significant. This paper will study the effects of SGS motions on the collision-related statistics of a bidisperse system that involves two groups of particles at different Stokes numbers using a direct numerical simulation (DNS) filtered DNS (FDNS) and LES. Compared with a monodisperse system at a single Stokes number the relative error of the collision rates in the bidisperse system is much smaller than that in the monodisperse one. For given filter widths and Stokes numbers the relative errors between the FDNS and LES are much smaller than their relative errors to DNS implying that the error caused by the filtering operation in LES plays a leading role in the overall error of the particle collision rate at Stokes numbers less than 3. A particle SGS model is thus necessary to consider the effect of SGS motions on bidisperse heavy particles. (C) 2016 Elsevier B.V. All rights reserved.
KeywordParticle-laden Turbulence Large-eddy Simulation Subgrid Scale Motion Bidisperse Particles Preferential Concentration Collision Rate
DOI10.1016/j.powtec.2016.12.069
Indexed BySCI ; CPCI-S ; EI
Language英语
WOS IDWOS:000401880700027
WOS KeywordDIRECT NUMERICAL SIMULATIONS ; SPACE-TIME CORRELATIONS ; INERTIAL PARTICLES ; APPROXIMATE DECONVOLUTION ; CLOUD DROPLETS ; FLUIDIZED-BED ; FLOW ; MODEL ; MOTION ; ATTENUATION
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationNational Natural Science Foundation of China(11472277 ; Strategic Priority Research Program CAS(XDB22040104) ; Key Research Program of Frontier Sciences CAS(QYZDJ-SSW-SYS002) ; Science Challenge Program(JCKY2016212A501) ; 973 Program of China(2013CB834100) ; 11232011)
DepartmentLNM湍流
Classification二类/Q1
Ranking1
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/60547
Collection非线性力学国家重点实验室
Corresponding AuthorJin, GD (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Chen JC,Jin GD,Jin, GD . Large-eddy simulation of turbulent preferential concentration and collision of bidisperse heavy particles in isotropic turbulence[J]. POWDER TECHNOLOGY,2017,314:281-290.
APA 陈进财,晋国栋,&Jin, GD .(2017).Large-eddy simulation of turbulent preferential concentration and collision of bidisperse heavy particles in isotropic turbulence.POWDER TECHNOLOGY,314,281-290.
MLA 陈进财,et al."Large-eddy simulation of turbulent preferential concentration and collision of bidisperse heavy particles in isotropic turbulence".POWDER TECHNOLOGY 314(2017):281-290.
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