GRAVITATIONAL SETTLING OF PARTICLES AND BUBBLES IN HOMOGENEOUS TURBULENCE

被引:46
作者
FUNG, JCH
机构
关键词
D O I
10.1029/93JC01845
中图分类号
P7 [海洋学];
学科分类号
0707 ;
摘要
I investigate whether, in general, the average settling velocity of a small particle/bubble subject to a square drag force in homogeneous, stationary turbulence with a Kolmogorov spectrum differs from that in still fluid and, in particular, the role played by the structures of the flow field. I study particle or bubble trajectories in a simple flow structure. Statistics have been computed for the motion of small particles/bubbles settling under gravity with a Gaussian random velocity generated by Fourier modes. As a main result it is shown that homogeneous turbulence does cause a net decrease of settling velocity in the case V(T)/u' approximately O(1).
引用
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页码:20287 / 20297
页数:11
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