Hydrodynamic Interactions Can Induce Jamming in Flow-Driven Systems,Physical Review Letters

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Hydrodynamic Interactions Can Induce Jamming in Flow-Driven Systems
Physical Review Letters ( IF 8.1 ) Pub Date : 2021-11-17 , DOI: 10.1103/physrevlett.127.214501
Eric Cereceda-López _{1,

2} , Dominik Lips ₃ , Antonio Ortiz-Ambriz _{1,

2,

4} , Artem Ryabov ₅ , Philipp Maass ₃ , Pietro Tierno _{1,

2,

4}

Affiliation

Hydrodynamic interactions between fluid-dispersed particles are ubiquitous in soft matter and biological systems and they give rise to intriguing collective phenomena. While it was reported that these interactions can facilitate force-driven particle motion over energetic barriers, here we show the opposite effect in a flow-driven system, i.e., that hydrodynamic interactions hinder transport across barriers. We demonstrate this result by combining experiments and theory. In the experiments, we drive colloidal particles using rotating optical traps, thus creating a vortex flow in the corotating reference frame. We observe a jamminglike decrease of particle currents with density for large barriers between traps. The theoretical model shows that this jamming arises from hydrodynamic interactions between the particles. The impact of hydrodynamic interactions is reversed compared to force-driven motion, suggesting that our findings are a generic feature of flow-driven transport.

中文翻译：

流体动力相互作用会导致流体驱动系统中的干扰

流体分散粒子之间的流体动力学相互作用在软物质和生物系统中无处不在，它们引起了有趣的集体现象。虽然据报道这些相互作用可以促进力驱动的粒子在高能障碍上的运动，但在这里我们展示了流动驱动系统中的相反效果，即流体动力相互作用阻碍了跨越障碍的传输。我们通过结合实验和理论来证明这一结果。在实验中，我们使用旋转光阱驱动胶体粒子，从而在共转参考系中产生涡流。对于陷阱之间的大势垒，我们观察到粒子电流随着密度的干扰而减少。理论模型表明这种干扰是由粒子之间的流体动力学相互作用引起的。

更新日期：2021-11-17

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