Intermittency in the enstrophy cascade of two-dimensional fully developed turbulence: Universal features
Abbreviated Journal Title
turbulence; TWO-DIMENSIONAL TURBULENCE; HIGH-REYNOLDS-NUMBER; INERTIAL-RANGE; SOAP; FILMS; NUMERICAL-SIMULATION; DECAYING TURBULENCE; COHERENT STRUCTURES; VELOCITY-GRADIENTS; ENERGY-SPECTRUM; 2D TURBULENCE; Physics, Multidisciplinary
Intermittency (externally induced) in the two-dimensional (2D) enstrophy cascade is shown to be able to maintain a finite enstrophy along with a vorticity conservation anomaly. Intermittency mechanisms of three-dimensional (3D) energy cascade and 2D enstrophy cascade in fully developed turbulence (FDT) seem to have some universal features. The parabolic-profile approximation (PPA) for the singularity spectrum f(alpha) in multi-fractal model is used and extended to the appropriate micro-scale regimes to exhibit these features. The PPA is also shown to afford, unlike the generic multi-fractal model, an analytical calculation of probability distribution functions (PDF) of flow-variable gradients in these FDT cases and to describe intermittency corrections that complement those provided by the homogeneous-fractal model. (C) 2007 Elsevier Inc. All rights reserved.
Annals of Physics
"Intermittency in the enstrophy cascade of two-dimensional fully developed turbulence: Universal features" (2008). Faculty Bibliography 2000s. 980.