Acceleration of Passive Tracers in Compressible Turbulent Flow

doi:10.1103/PhysRevLett.110.064503

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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
DOI	10.1103/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).