手性活性流体的约束诱导泵送
Confinement-Induced Pumping of Chiral Active Fluids
- Heinrich-Heine-Universität Düsseldorf（杜塞尔多夫大学）
- Shenzhen University（深圳大学）
- Forschungszentrum Jülich（于利希研究中心）
机构由 AI 辅助整理，请以论文原文为准。
中文总结 AI 辅助
本文通过介观模拟发现，具有内在不对称性的通道能自发产生净通量，无需外部力，从而将手性活性流体的微观旋转转化为宏观定向输运，为自驱动微流控泵送提供新策略。
中文摘要 AI 辅助
由持续旋转的活性组分构成的手性活性流体，展现出由活性、流体动力学相互作用和镜面对称性破缺共同作用而产生的大量非平衡现象。尽管这些系统自然产生循环流动和活性湍流，但将其微观旋转运动转化为定向宏观输运仍是一个未解决的挑战。通过介观流体动力学模拟，我们在此表明，具有内在不对称性的通道在无外部施加压力梯度或体积力的情况下，会导致持久净通量的自发形成。我们的结果可推广到各种几何约束策略，为将手性活性转化为自主流体输运提供了高效且多用途的方法，使其可作为自驱动微流控泵送的有前景平台。
英文摘要
Chiral active fluids, composed of continuously rotating active constituents, exhibit a wealth of nonequilibrium phenomena arising from the interplay of activity, hydrodynamic interactions, and broken mirror symmetry. While these systems naturally generate circulating flows and active turbulence, converting their microscopic rotational motion into directed macroscopic transport remains an open challenge. By means of mesoscale hydrodynamic simulations, here we show that channels with an intrinsic asymmetry result in the spontaneous formation of a persistent net flux in the absence of externally imposed pressure gradients or body forces. Our results can be extrapolated to various geometric confinement strategies providing efficient and versatile strategies for transforming chiral activity into autonomous fluid transport, such that they can be utilized as a promising platform for self-powered microfluidic pumping.
