Large-eddy simulation of turbulent preferential concentration and collision of bidisperse heavy particles in isotropic turbulence
文献类型：期刊论文
| 作者 | Chen JC(陈进财); Jin GD(晋国栋)
|
| 刊名 | POWDER TECHNOLOGY
 |
| 出版日期 | 2017-06-01 |
| 卷号 | 314页码:281-290 |
| 关键词 | Particle-laden turbulence Large-eddy simulation Subgrid scale motion Bidisperse particles Preferential concentration Collision rate |
| ISSN号 | 0032-5910 |
| 中文摘要 | 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. |
| 类目[WOS] | Engineering, Chemical |
| 研究领域[WOS] | Engineering |
| 关键词[WOS] | DIRECT NUMERICAL SIMULATIONS ; SPACE-TIME CORRELATIONS ; INERTIAL PARTICLES ; APPROXIMATE DECONVOLUTION ; CLOUD DROPLETS ; FLUIDIZED-BED ; FLOW ; MODEL ; MOTION ; ATTENUATION |
| 收录类别 | SCI ; CPCI-S ; EI |
| 语种 | 英语 |
| WOS记录号 | WOS:000401880700027 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/60547]  |
| 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 | Chen JC,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.(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. |
入库方式： OAI收割
来源：力学研究所
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