Subgrid scale modeling for turbulence in rotating reference frames

It is well known that large- or middle-scale atmospheric turbulence is stro ngly affected by Coriolis force which produce particular eddy structures in the flow field. In this study, subgrid-scale modeling considering Coriolis force was presented following the method proposed by Yoshizawa et al. [Phy s. Fluids 8 (1996) 2254]. The proposed subgrid-scale model was successfully applied to LES of rotating channel flows at Re-tau = 150 and 590 normalize d by the channel half-width and the friction velocity and the effect of rot ation at low and moderate Reynolds number was investigated. The dynamic pro cedure proposed by Germane et al. [Phys, Fluids A 3 (1991) 1760], was adopt ed to determine the model parameter dynamically depending on the flow field . The way to discretize spatial filtering operation by the finite differenc e method required for the procedure, to be also presented, is indispensable for the application of the method to engineering and geophysical problems. Dependence of the results on discretized filtering was also examined. (C) 1999 Elsevier Science Ltd, All rights reserved.