Universality of anisotropic turbulence

详细信息    查看全文

• 作者：Biferale ; L. ; Calzavarini ; E. ; Lanotte ; A.S. ; Toschi ; F. ; Tripiccione ; R.
• 关键词：47.27.&minus ; i ; 47.27.Gs ; Turbulent flows ; Homogeneous turbulence ; Convection
• 刊名：Physica A
• 出版年：2004
• 出版时间：July 1, 2004
• 年：2004
• 卷：338
• 期：1-2
• 页码：194-200
• 全文大小：234 K

文摘

We review some ideas about the physics of small-scale turbulent statistics, focusing on the scaling behavior of anisotropic fluctuations. We present results from direct numerical simulations of three-dimensional homogeneous, anisotropically forced, turbulent systems: the Rayleigh–Bénard system, the random-Kolmogorov-flow, and a third flow with constant anisotropic energy spectrum at low wave numbers. A comparison of the anisotropic scaling properties displays good similarity among these very different flows. Our findings support the conclusion that scaling exponents of anisotropic fluctuations are universal, i.e., independent of the forcing mechanism sustaining turbulence.