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Evolution of a turbulent cloud under rotation 期刊名称： Journal of Fluid Mechanics
91年属羊>喜鹊生活作者： Ranjan, A., Davidson, P.?A.肉酿面筋
年份： 2014年恶露是什么颜色
皇帝新衣关键词： rotating flows; rotating turbulence; waves in rotating fluids
小复摘要：Localized patches of turbulence frequently occur in geophysics, such as in the atmosphere and oceans. The effect of rotation, , on such a region (a turbulent cloud) is governed by inhomogeneous dynamics. In contrast, most investigations of rotating turbulence deal with the homogeneous ca, although inhomogeneous turbulence is more common in practice. In this paper, we describe the results of direct numerical simulations (DNS) of a turbulent cloud under rotation at three Rossby numbers ( ), namely 0.1, 0.3 and 0.5. Using a spatial filter, fully developed homogeneous turbulence is vertically confined to the centre of a periodic box before the rotation is turned on. Energy isosurfaces show that columnar structures emerge from the cloud and grow into the adjacent quiescent fluid. Helicity is ud as a diagnostic and confirms
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