零均值振荡在消失雷诺数势流中驱动回流
Zero-Mean Oscillations Drive Recirculations in Potential Flows at Vanishing Reynolds Number
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中文总结 AI 辅助
本文实验证明,通过耦合Hele-Shaw槽顶振荡与偏心障碍物,可在消失雷诺数势流中定点产生回流,且净漂移可由无参数势流模型描述,并可组合成微尺度可编程流动模式。
中文摘要 AI 辅助
回流流动对输运现象至关重要,但在势流中产生回流需要额外的物理机制。我们通过实验证明,在消失雷诺数下,通过将Hele-Shaw槽顶部的振荡与偏心无源障碍物耦合,可以在指定位置产生回流。净漂移可由无可调参数势流模型很好地描述。所得流动局限于障碍物周围,并可组合以在微尺度上生成可编程流动模式。
英文摘要
Recirculating flows are central to transport phenomena, but their generation in potential flows requires additional physical mechanisms. We show experimentally that recirculation at vanishing Reynolds number can be produced at prescribed locations by coupling oscillations of a Hele-Shaw cell ceiling with an off-center passive obstacle. The net drift is well described by a potential flow model with no adjustable parameters. The resulting flows are localized around the obstacles and can be combined to generate programmable flow patterns at the microscale.
发表机构
- Laboratoire d’Hydrodynamique (LadHyX), CNRS, École Polytechnique, Institut Polytechnique de Paris(拉伊克流体力学实验室,法国国家科学研究中心,巴黎综合理工学院,巴黎理工学院)
- Institut Pasteur, Université Paris Cité(巴斯德研究所,巴黎西岱大学)
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