回転流路の乱流の数値解析 : 第2報,乱れの生成におけるコリオリ力の影響

概要

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Characteristics of the structure of turbulent flow in a rotating channel have been investigated numerically using Large Eddy Simulation (LES). The authors' previous paper reported successful prediction of the global effect of Coriolis force by simulation. In this paper, attention is focused on the behaviour of large eddies, and the mechanism of production of turbulence under the action of Coriolis force is discussed. LES is confirmed to be useful in simulating actual turbulent eddies to obtain information which is difficult to get experimentally. It is suggested that, in the Coriolis force field, the so-called "sweep" and "eject", which make a positive contribution to the production of Reynolds stress and turbulent energy, are intensified, while contribution of "interaction" varies little, on the pressure surface side. Contrarily, on the stabilized side, the streak structure, which is closely associated with the production of turbulence, is observed to disappear.
一般社団法人日本機械学会の論文
1986-02-25