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Titolo:
A dynamical model for turbulence. VIII. IR and UV Reynolds stress spectra for shear-driven flows
Autore:
Canuto, VM; Dubovikov, MS; Yu, G;
Indirizzi:
NASA, Goddard Inst Space Studies, New York, NY 10025 USA NASA New York NYUSA 10025 ard Inst Space Studies, New York, NY 10025 USA Columbia Univ, Dept Appl Phys, New York, NY 10027 USA Columbia Univ New York NY USA 10027 ept Appl Phys, New York, NY 10027 USA Columbia Univ, Ctr Climate Syst Res, New York, NY 10027 USA Columbia UnivNew York NY USA 10027 mate Syst Res, New York, NY 10027 USA
Titolo Testata:
PHYSICS OF FLUIDS
fascicolo: 3, volume: 11, anno: 1999,
pagine: 665 - 677
SICI:
1070-6631(199903)11:3<665:ADMFTV>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
18
Recensione:
Indirizzi per estratti:
Indirizzo: Canuto, VM NASA, Goddard Inst Space Studies, 2880 Broadway, New York, NY 10025 USA NASA 2880 Broadway New York NY USA 10025 New York, NY 10025 USA
Citazione:
V.M. Canuto et al., "A dynamical model for turbulence. VIII. IR and UV Reynolds stress spectra for shear-driven flows", PHYS FLUIDS, 11(3), 1999, pp. 665-677

Abstract

The basic equations for the two-point Reynolds stresses derived in paper II are solved analytically in two regimes: the UV (ultraviolet) region corresponding to the inertial range and the IR (infrared) region corresponding to k-->0. The analytic treatment is possible due to the existence of two smallness parameters: U-i,U-j(k(2)v(t))(-1) in the UV region and kL in the IR region; U-i,U-j is the mean velocity gradient, v(t)(k) is the turbulent viscosity, and L is the integral length scale. For an arbitrary flow, the Reynolds stress spectrum in the UV region is given by Eqs. (53)-(59). In the IRregion, and in the first-order approximation in kL, the spectra coincide with those of the rapid distortion theory. Since they are flow dependent, weshall discuss a few representative cases. The resulting Reynolds stress spectra, which are shown to reproduce existing data, are the basis for the calculation of the one-point Reynolds stresses to be presented in paper IX. The model has no free parameters. (C) 1999 American Institute of Physics. [S1070-6631(99)00303-7].

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Documento generato il 14/07/20 alle ore 07:00:15