Anomalous scaling of low-order structure functions of turbulent velocity
نویسندگان
چکیده
By S. Y. CHEN, B. DHRUVA, S. KURIEN, K. R. SREENIVASAN AND M. A. TAYLOR Department of Mechanical Engineering, Johns Hopkins University, Baltimore, MD 21218 Schlumberger Cambridge Research, Madingley Road, Cambridge CB3 0EL Center for Nonlinear Studies (CNLS) and Mathematical Modeling & Analysis Group (T7), Los Alamos National Laboratory, Los Alamos, NM 87505 International Centre for Theoretical Physics, Strada Costiera 11, 34014 Trieste, Italy Computer and Computational Sciences (CCS-3), Los Alamos National Laboratory, Los Alamos, NM 87505
منابع مشابه
Anomalous scaling of a passive scalar advected by the turbulent velocity field with finite correlation time: two-loop approximation.
The renormalization group and operator product expansion are applied to the model of a passive scalar quantity advected by the Gaussian self-similar velocity field with finite, and not small, correlation time. The inertial-range energy spectrum of the velocity is chosen in the form E(k) proportional, variant k(1-2 epsilon ), and the correlation time at the wave number k scales as k(-2+eta). Ine...
متن کاملAnomalous scaling in two and three dimensions for a passive vector field advected by a turbulent flow
A model of the passive vector field advected by the uncorrelated in time Gaussian velocity with power-like covariance is studied by means of the renormalization group and the operator product expansion. The structure functions of the admixture demonstrate essential power-like dependence on the external scale in the inertial range (the case of an anomalous scaling). The method of finding of inde...
متن کاملScaling of Low-Order Structure Functions in Homogeneous Turbulence.
High-resolution direct numerical simulation data for three-dimensional Navier-Stokes turbulence in a periodic box are used to study the scaling behavior of low-order velocity structure functions with positive and negative powers. Similar to high-order statistics, the low-order relative scaling exponents exhibit unambiguous departures from the Kolmogorov 1941 theory and agree well with existing ...
متن کاملAnomalous self-similarity in a turbulent rapidly rotating fluid.
Our velocity measurements on quasi-two-dimensional turbulent flow in a rapidly rotating annulus yield self-similar (scale-independent) probability distribution functions for longitudinal velocity differences, deltav(l) = v(x+l)-v(x). These distribution functions are strongly non-Gaussian, suggesting that the coherent vortices play a significant role. The structure functions <[deltav(l)](p)> app...
متن کاملStatistically preserved structures and anomalous scaling in turbulent active scalar advection
– The anomalous scaling of correlation functions in the turbulent statistics of active scalars (like temperature in turbulent convection) is understood in terms of an auxiliary passive scalar which is advected by the same turbulent velocity field. The even-order correlation functions of the two fields are the same to leading order (up to a trivial multiplicative factor). The leading correlation...
متن کامل