| Title | Acceleration of Passive Tracers in Compressible Turbulent Flow |
| Authors | Yang, Yantao Wang, Jianchun Shi, Yipeng Xiao, Zuoli He, X. T. Chen, Shiyi |
| Affiliation | Peking Univ, State Key Lab Turbulence & Complex Syst, Ctr Appl Phys & Technol, Beijing 100871, Peoples R China. Peking Univ, Key Lab High Energy Dens Phys Simulat, Minist Educ, Coll Engn, Beijing 100871, Peoples R China. |
| Keywords | FULLY-DEVELOPED TURBULENCE STATISTICS PARTICLES DYNAMICS |
| Issue Date | 2013 |
| Publisher | 物理评论快报 |
| Citation | PHYSICAL REVIEW LETTERS.2013,110,(6). |
| Abstract | In compressible turbulence at high Reynolds and Mach numbers, shocklets emerge as a new type of flow structure in addition to intense vortices as in incompressible turbulence. Using numerical simulation of compressible homogeneous isotropic turbulence, we conduct a Lagrangian study to explore the effects of shocklets on the dynamics of passive tracers. We show that shocklets cause very strong intermittency and short correlation time of tracer acceleration. The probability density function of acceleration magnitude exhibits a -2.5 power-law scaling in the high compression region. Through a heuristic model, we demonstrate that this scaling is directly related to the statistical behavior of strong negative velocity divergence, i.e., the local compression. Tracers experience intense acceleration near shocklets, and most of them are decelerated, usually with large curvatures in their trajectories. DOI: 10.1103/PhysRevLett.110.064503 |
| URI | http://hdl.handle.net/20.500.11897/315656 |
| ISSN | 0031-9007 |
| DOI | 10.1103/PhysRevLett.110.064503 |
| Indexed | SCI(E) EI PubMed |
| Appears in Collections: | 工学院 湍流与复杂系统国家重点实验室 |
