Measuring nonextensitivity parameters in a turbulent Couette-Taylor flow -art. no. 035303

Citation
C. Beck et al., Measuring nonextensitivity parameters in a turbulent Couette-Taylor flow -art. no. 035303, PHYS REV E, 6303(3), 2001, pp. 5303
Citations number
22
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW E
ISSN journal
1063-651X → ACNP
Volume
6303
Issue
3
Year of publication
2001
Part
2
Database
ISI
SICI code
1063-651X(200103)6303:3<5303:MNPIAT>2.0.ZU;2-V
Abstract
We investigate probability density functions of velocity differences at dif ferent distances r measured in a Couette-Taylor flow for a range of Reynold s 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 no nextensitivity parameter q(r,Re) from the laboratory data.