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Acceleration of Passive Tracers in Compressible Turbulent Flow
Yang, Yantao ; Wang, Jianchun ; Shi, Yipeng ; Xiao, Zuoli ; He, X. T. ; Chen, Shiyi
刊名物理评论快报
2013
关键词FULLY-DEVELOPED TURBULENCE STATISTICS PARTICLES DYNAMICS
DOI10.1103/PhysRevLett.110.064503
英文摘要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; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000314770600008&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Physics, Multidisciplinary; SCI(E); EI; PubMed; 6; ARTICLE; 6; 064503; 110
语种英语
内容类型期刊论文
源URL[http://ir.pku.edu.cn/handle/20.500.11897/315656]  
专题工学院
推荐引用方式
GB/T 7714
Yang, Yantao,Wang, Jianchun,Shi, Yipeng,et al. Acceleration of Passive Tracers in Compressible Turbulent Flow[J]. 物理评论快报,2013.
APA Yang, Yantao,Wang, Jianchun,Shi, Yipeng,Xiao, Zuoli,He, X. T.,&Chen, Shiyi.(2013).Acceleration of Passive Tracers in Compressible Turbulent Flow.物理评论快报.
MLA Yang, Yantao,et al."Acceleration of Passive Tracers in Compressible Turbulent Flow".物理评论快报 (2013).
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