SCALE RESOLVED INTERMITTENCY IN TURBULENCE

Citation
S. Grossmann et D. Lohse, SCALE RESOLVED INTERMITTENCY IN TURBULENCE, Physics of fluids, 6(2), 1994, pp. 611-617
Citations number
51
Categorie Soggetti
Mechanics,"Phsycs, Fluid & Plasmas
Journal title
ISSN journal
10706631
Volume
6
Issue
2
Year of publication
1994
Part
1
Pages
611 - 617
Database
ISI
SICI code
1070-6631(1994)6:2<611:SRIIT>2.0.ZU;2-M
Abstract
The deviations deltazeta(m) (''intermittency corrections'') from class ical (''K41'') scaling zeta(m)=m/3 of the mth moments [\u(p)\m] in hig h Reynolds number turbulence are calculated, extending a method to app roximately solve the Navier-Stokes equation described earlier. It is s uggested to introduce the notion of scale resolved intermittency corre ctions deltazeta(m)(p), because these deltazeta(m)(p) are found to be large in the viscous subrange, moderate in the nonuniversal stirring s ubrange but, surprisingly, extremely small if not zero in the inertial subrange. If ISR intermittency corrections persisted in experiment up to the large Reynolds number limit, it would show by calculation that this could be due to the opening of phase space for larger wave vecto rs. In the higher order velocity moments [\u(p)\m] the crossover betwe en inertial and viscous subrange is (10etam/2)-1, thus the inertial su brange is smaller for higher order moments.