| Characteristics of clustered particle relative velocity in homogeneous and isotropic turbulence | |
| Li T(李拓); Li XY(李心阳); Lian H(连欢) | |
| Source Publication | PHYSICS OF FLUIDS
 |
| 2023-08-01 | |
| Volume | 35Issue:8Pages:85121 |
| ISSN | 1070-6631 |
| Abstract | 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. |
| DOI | 10.1063/5.0157869 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001047290200001 |
| WOS Research Area | Mechanics ; Physics |
| WOS Subject | Mechanics ; Physics, Fluids & Plasmas |
| Funding Organization | National Natural Science Foundation of China [91941104, 11872366] |
| Classification | 一类/力学重要期刊 |
| Ranking | 1 |
| Contributor | Lian, H (corresponding author), Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China. |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/92595 |
| Collection | 高温气体动力学国家重点实验室 |
| Affiliation | 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 |
| Recommended Citation 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.Rp_Au:Lian, H (corresponding author), Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China. |
| 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. |
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| Jp2023A177.pdf（3437KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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