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

CORC > 力学研究所 > 中国科学院力学研究所 > 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)
刊名	International Journal of Multiphase Flow
	2009
通讯作者邮箱	lwang@me.udel.edu
卷号	35 期号:9 页码:854-867
ISSN号	0301-9322
通讯作者	王连平
合作状况	国际
中文摘要	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.
学科主题	流体力学
类目[WOS]	Mechanics
研究领域[WOS]	Mechanics
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
收录类别	SCI
语种	英语
WOS记录号	WOS:000269115600007
公开日期	2009-12-28
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/32996]
专题	力学研究所_非线性力学国家重点实验室
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.(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.