Turbulent collision of inertial particles: point-particle based, hybrid simulations and beyond

doi:10.1016/j.ijmultiphaseflow.2009.02.012

IMECH-IR > 非线性力学国家重点实验室

	Turbulent collision of inertial particles: point-particle based, hybrid simulations and beyond
	Wang LP(王连平); Bogdan R; Gao H; He GW(何国威); Jin GD(晋国栋); Wang LP(王连平)
发表期刊	International Journal of Multiphase Flow
	2009
卷号	35 期号:9 页码:854-867
ISSN	0301-9322
摘要	Point-particle based direct numerical simulation (PPDNS) has been a productive research tool for studying both single-particle and particle-pair statistics of inertial particles suspended in a turbulent carrier flow. Here we focus on its use in addressing particle-pair statistics relevant to the quantification of turbulent collision rate of inertial particles. PPDNS is particularly useful as the interaction of particles with small-scale (dissipative) turbulent motion of the carrier flow is mostly relevant. Furthermore, since the particle size may be much smaller than the Kolmogorov length of the background fluid turbulence, a large number of particles are needed to accumulate meaningful pair statistics. Starting from the relative simple Lagrangian tracking of so-called ghost particles, PPDNS has significantly advanced our theoretical understanding of the kinematic formulation of the turbulent geometric collision kernel by providing essential data on dynamic collision kernel, radial relative velocity, and radial distribution function. A recent extension of PPDNS is a hybrid direct numerical simulation (HDNS) approach in which the effect of local hydrodynamic interactions of particles is considered, allowing quantitative assessment of the enhancement of collision efficiency by fluid turbulence. Limitations and open issues in PPDNS and HDNS are discussed. Finally, on-going studies of turbulent collision of inertial particles using large-eddy simulations and particle- resolved simulations are briefly discussed.
学科领域	流体力学
DOI	10.1016/j.ijmultiphaseflow.2009.02.012
收录类别	SCI
语种	英语
WOS记录号	WOS:000269115600007
关键词[WOS]	HOMOGENEOUS ISOTROPIC TURBULENCE ; LARGE-EDDY SIMULATION ; DIRECT NUMERICAL SIMULATIONS ; HYDRODYNAMICALLY-INTERACTING PARTICLES ; PREFERENTIAL CONCENTRATION ; CLOUD DROPLETS ; HEAVY-PARTICLES ; SETTLING VELOCITY ; AEROSOL-PARTICLES ; SOLID PARTICLES
WOS研究方向	Mechanics
WOS类目	Mechanics
引用统计	被引频次：48[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/311007/32996
专题	非线性力学国家重点实验室
通讯作者	Wang LP(王连平)
推荐引用方式 GB/T 7714	Wang LP,Bogdan R,Gao H,et al. Turbulent collision of inertial particles: point-particle based, hybrid simulations and beyond[J]. International Journal of Multiphase Flow,2009,35,9,:854-867.
APA	Wang LP,Bogdan R,Gao H,何国威,晋国栋,&王连平.(2009).Turbulent collision of inertial particles: point-particle based, hybrid simulations and beyond.International Journal of Multiphase Flow,35(9),854-867.
MLA	Wang LP,et al."Turbulent collision of inertial particles: point-particle based, hybrid simulations and beyond".International Journal of Multiphase Flow 35.9(2009):854-867.

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