Theoretical Turbulence Modelling of Homogeneous Decaying Flow in a Rotating Frame

抄録

Homogeneous turbulent flow with no mean velocity in arotating frame is analyzed using a two-scale direct-interactionapproximation to investigate the system-rotation effecttheoretically. On this basis, the system-rotation effect on the energyspectrum is discussed, and a model equation for the energy dissipationrate subject to the combined effects of unstationarity and systemrotation is derived. The latter is tested using experimental anddirect-numerical-simulation results and is shown to be in goodagreement with them.