Layering instability in a confined suspension flow.
Layering instability in a confined suspension flow.
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受限悬浮液流中的分层不稳定。
DOI：
10.1103/physrevlett.108.068301
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发表时间：
2011
影响因子：
8.6
通讯作者：
E. Wajnryb
中科院分区：
文献类型：
--
作者：
M. Zurita;J. Blawzdziewicz;E. Wajnryb
我们表明[J.Fluid Mech.592，447（2007）]，在受限悬浮流中交换（反转）轨迹防止了在相邻流线中彼此接近的颗粒之间的碰撞。在这里，我们表明，通过诱导分层，这种流体动力学机制改变了在一个封闭的库埃特流悬浮液的微观结构。层发生在近壁区域或跨越整个通道宽度，这取决于交换轨迹效应的强度。虽然我们的理论侧重于稀悬浮液，我们假设，这种新的流体动力学机制控制形成的层状微结构在很宽的密度范围。
We show [J. Fluid Mech. 592, 447 (2007)] that swapping (reversing) trajectories in confined suspension flows prevent collisions between particles approaching each other in adjacent streamlines. Here we demonstrate that by inducing layering this hydrodynamic mechanism changes the microstructure of suspensions in a confined Couette flow. Layers occur either in the near-wall regions or span the whole channel width, depending on the strength of the swapping-trajectory effect. While our theory focuses on dilute suspensions, we postulate that this new hydrodynamic mechanism controls the formation of a layered microstructure in a wide range of densities.