Large-eddy simulation of turbulent preferential concentration and collision of bidisperse heavy particles in isotropic turbulence

doi:10.1016/j.powtec.2016.12.069

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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.
发表期刊	POWDER TECHNOLOGY
	2017-06-01
卷号	314 页码:281-290
ISSN	0032-5910
摘要	Particle-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.
关键词	Particle-laden Turbulence Large-eddy Simulation Subgrid Scale Motion Bidisperse Particles Preferential Concentration Collision Rate
DOI	10.1016/j.powtec.2016.12.069
收录类别	SCI ; CPCI-S ; EI
语种	英语
WOS记录号	WOS:000401880700027
关键词[WOS]	DIRECT NUMERICAL SIMULATIONS ; SPACE-TIME CORRELATIONS ; INERTIAL PARTICLES ; APPROXIMATE DECONVOLUTION ; CLOUD DROPLETS ; FLUIDIZED-BED ; FLOW ; MODEL ; MOTION ; ATTENUATION
WOS研究方向	Engineering
WOS类目	Engineering, Chemical
项目资助者	National 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)
课题组名称	LNM湍流
论文分区	二类/Q1
力学所作者排名	1
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/60547
专题	非线性力学国家重点实验室
通讯作者	Jin, GD (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
推荐引用方式 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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