TRANSPORT OF TURBULENT VORTICITY INCREMENTS

Citation
Ra. Antonia et al., TRANSPORT OF TURBULENT VORTICITY INCREMENTS, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 57(5), 1998, pp. 5483-5488
Citations number
18
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physycs, Mathematical","Phsycs, Fluid & Plasmas
ISSN journal
1063-651X
Volume
57
Issue
5
Year of publication
1998
Part
B
Pages
5483 - 5488
Database
ISI
SICI code
1063-651X(1998)57:5<5483:TOTVI>2.0.ZU;2-R
Abstract
Starting with the Navier-Stokes equations, a transport equation is wri tten for the sum of the squared vorticity increments in homogeneous is otropic turbulence. This equation is compared with that for the sum of the squared velocity increments; whereas the latter equation exhibits a linear dependence on separation, the former does not. In the limit of a negligibly small separation, the new equation expresses a balance between the production and dissipation of the mean square vorticity g radient. All terms in the equation have been measured using a three-co mponent vorticity probe in the self-preserving region of a low Reynold s number turbulent wake.