Microswimmer trapping in surface waves with shear
Microswimmer trapping in surface waves with shear
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DOI：
10.1098/rspa.2023.0280
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发表时间：
2023-10-11
影响因子：
3.5
通讯作者：
De Lillo，F.
中科院分区：
文献类型：
--
作者：
Ventrella，F. M.;Pujara，N.;De Lillo，F.
许多种类的浮游植物在海洋表面附近垂直迁徙，以寻找光线或营养物质。这些能动的生物受到海洋表面波浪的影响。我们推导了一组波浪平均方程来描述球体形状的微泳者的运动，其中包括几个附加的效应，如回转、沉降和风致切变。除了众所周知的斯托克斯漂移，微泳者的轨迹取决于他们的方位，这种方式可能会导致在特定深度捕获；这反过来可能会影响生物的运输，并可能有助于解释海洋中观察到的浮游植物层。
Many species of phytoplankton migrate vertically near the surface of the ocean, in search of either light or nutrients. These motile organisms are affected by ocean surface waves. We derive a set of wave-averaged equations to describe the motion of microswimmers with spheroidal body shapes that includes several additional effects, such as gyrotaxis, settling and wind-driven shear. In addition to the well-known Stokes drift, the microswimmer trajectories depend on their orientation in a way that can lead to trapping at a particular depth; this in turn can affect transport of organisms, and may help explain observed phytoplankton layers in the ocean.