An analytical model of velocity-derivative skewness of rotating homogeneous turbulence

Abstract

The velocity-derivative skewness of rotating homogeneous turbulence is analytically derived from the turbulent kinetic energy dissipation rate equation by assuming a simple energy spectrum function. It predicts the cut-off of spectral energy at large rotation rate, and the predicted reduction of skewness due to rotation agrees well with the results of direct numerical simulation and eddy-damped quasi-normal Markovian closure. (C) 2000 The Japan Society of Fluid Mechanics and Elsevier Science B.V. All rights reserved.