Abstract
A direct numerical simulation at resolution 2403 is used
to obtain a statistically stationary three-dimensional homogeneous
and isotropic turbulent field at a Reynolds number around 1000
(Rλ ≈ 150). The energy spectrum
displays an inertial subrange. The velocity derivative distribution,
known to be strongly non-Gaussian, is found to be close to, but not,
exponential. The nth-order moments of this
distribution, as well as the velocity structure functions, do not
scale with n as predicted by intermittency models.
Visualization of the flow confirms the previous finding that the
strongest vorticity is organized in very elongated thin tubes. The
width of these tubes is of the order of a few dissipation scales,
while their length can reach the integral scale of the flow.
Publisher
Cambridge University Press (CUP)
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics
Reference40 articles.
1. Parisi, G. & Frisch, U. , 1984 In Turbulence and Predictability, Varenna Summer School (ed. M. Ghol , R. Benzi & G. Parisi ), p. 84. North Holland.
2. Tsinober, A. , Kit, E. & Dracos, T. , 1991 J. Fluid Mech. (submitted).
3. Announcement
4. A Decaying Isotropic Turbulence Pursued by the Spectral Method
5. On the Statistical Properties of Two-Dimensional Decaying Turbulence
Cited by
879 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献