| 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)
| |
| Source Publication | International Journal of Multiphase Flow
 |
| 2009 | |
| Volume | 35Issue:9Pages:854-867 |
| ISSN | 0301-9322 |
| Abstract | 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. |
| Subject Area | 流体力学 |
| DOI | 10.1016/j.ijmultiphaseflow.2009.02.012 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000269115600007 |
| WOS Keyword | 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 Research Area | Mechanics |
| WOS Subject | Mechanics |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/32996 |
| Collection | 非线性力学国家重点实验室 |
| Corresponding Author | Wang LP(王连平) |
| Recommended Citation 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. |
| Files in This Item: | Download All | |||||
| File Name/Size | DocType | Version | Access | License | ||
| Wang_etal_review_IJM（1209KB） | 开放获取 | License | View Download | |||
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment