Characteristics of clustered particle relative velocity in homogeneous and isotropic turbulence
文献类型：期刊论文
| 作者 | Li T(李拓); Li XY(李心阳); Lian H(连欢) |
| 刊名 | PHYSICS OF FLUIDS
 |
| 出版日期 | 2023-08-01 |
| 卷号 | 35期号:8页码:85121 |
| ISSN号 | 1070-6631 |
| DOI | 10.1063/5.0157869 |
| 英文摘要 | Particle collisions are mainly governed by the preferential concentration of inertia particles and the formation of fold caustics. By fold caustics, we mean that relative velocity does not go smoothly to zero when the particle separations decrease due to inertia. Despite the importance of the second-order relative velocity structure function, there has been relatively little experimental research on the formation of caustics due to the high accuracy requirements for the particle relative velocity measurements. In the dissipation range, an obvious departure between the second-order structure function of particles normalized by the square of the Kolmogorov velocity and the Kolmogorov turbulent scaling of r(2) was observed for all four experimental conditions. In the inertial range, the second-order structure function normalized by the square of the Kolmogorov velocity was consistent with the scale form of r(2/3) in all cases. The conditional second-order relative velocity structure function of particles in clusters differs from that of the arithmetically averaged particle statistics in both the dissipation range and the inertial subrange. In the dissipation range, caustics are present for all categories of particles. In the inertial range, the scaling of the second-order velocity structure function is almost identical for all categorized particle types. |
| 分类号 | 一类/力学重要期刊 |
| WOS研究方向 | Mechanics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001047290200001 |
| 资助机构 | National Natural Science Foundation of China [91941104, 11872366] |
| 其他责任者 | Lian, H (corresponding author), Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China. |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/92595]  |
| 专题 | 力学研究所_高温气体动力学国家重点实验室 |
| 作者单位 | 1.{Li, Tuo, Li, Xinyang, Lian, Huan} Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China 2.{Li, Tuo, Li, Xinyang} Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li T,Li XY,Lian H. Characteristics of clustered particle relative velocity in homogeneous and isotropic turbulence[J]. PHYSICS OF FLUIDS,2023,35(8):85121. |
| APA | 李拓,李心阳,&连欢.(2023).Characteristics of clustered particle relative velocity in homogeneous and isotropic turbulence.PHYSICS OF FLUIDS,35(8),85121. |
| MLA | 李拓,et al."Characteristics of clustered particle relative velocity in homogeneous and isotropic turbulence".PHYSICS OF FLUIDS 35.8(2023):85121. |
入库方式： OAI收割
来源：力学研究所
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