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

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