Stratlets: Low Reynolds Number Point-Force Solutions in a Stratified Fluid
Stratlets: Low Reynolds Number Point-Force Solutions in a Stratified Fluid
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DOI：
10.1103/physrevlett.105.084502
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发表时间：
2010-08-20
影响因子：
8.6
通讯作者：
Stocker, R.
中科院分区：
文献类型：
--
作者：
Ardekani, A. M.;Stocker, R.
给出了层状流体中低雷诺数流动的基本解，包括点力(斯托克斯莱特)和二重力的情况。分层通过产生环状涡流极大地改变了流动，速度的衰减比均匀流体中的速度快得多。基本长度尺度由浮力、扩散和粘度的竞争确定，在水环境中为0(100亩m-1 mm)。因此，层化可能会影响小生物的游泳和海洋雪粒的下沉，并降低海洋中机械传感的有效性。
We present fundamental solutions of low Reynolds number flows in a stratified fluid, including the case of a point force (Stokeslet) and a doublet. Stratification dramatically alters the flow by creating toroidal eddies, and velocity decays much faster than in a homogeneous fluid. The fundamental length scale is set by the competition of buoyancy, diffusion and viscosity, and is 0(100 mu m-1 mm) in aquatic environments. Stratification can therefore affect the swimming of small organisms and the sinking of marine snow particles, and diminish the effectiveness of mechanosensing in the ocean.