Superstatistical mechanics of tracer-particle motions in turbulence

被引：137

作者：

Reynolds, AM ^{[1
]}

机构：

[1] Silsoe Res Inst, Silsoe MK45 4HS, Beds, England

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 91卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.91.084503

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The Lagrangian stochastic model of Reynolds [Phys. Fluids 15, L1-4 (2003)] for the accelerations of fluid particles in turbulence is shown to predict precisely the observed Reynolds-number dependency of the distribution of Lagrangian accelerations and the exponents characterizing the observed extended self-similarity scaling of the Lagrangian velocity structure functions. Departures from superstatistics of the log-normal kind are accounted for and their impact upon model predictions is quantified.

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页数：4

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