Measuring nonextensitivity parameters in a turbulent Couette-Taylor flow

被引：170

作者：

Beck, C

Lewis, GS

Swinney, HL

机构：

[1] Queen Mary Univ London, Sch Math Sci, London E1 4NS, England

[2] Calimetr Inc, Alameda, CA 94501 USA

[3] Univ Texas, Ctr Nonlinear Dynam, Austin, TX 78712 USA

[4] Univ Texas, Dept Phys, Austin, TX 78712 USA

来源：

PHYSICAL REVIEW E | 2001年 / 63卷 / 03期

关键词：

D O I：

10.1103/PhysRevE.63.035303

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

We investigate probability density functions of velocity differences at different distances r measured in a Couette-Taylor flow for a range of Reynolds numbers Re. There is good agreement with the predictions of a theoretical model based on nonextensive statistical mechanics (where the entropies are nonadditive for independent subsystems). We extract the scale-dependent nonextensitivity parameter q(r,Re) from the laboratory data.

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页码：353031 / 353034

页数：4

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