IF 7.3 1区 工程技术 Q1 INSTRUMENTS & INSTRUMENTATION
Neng-Zhi Yao, Bin Wang, Hao Wang, Chen-Long Wu, Tien-Mo Shih, Xuesheng Wang
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引用次数: 0

摘要

要在微流控、纳米工程和生物医药等领域取得突破,以及实现对缓解全球能源危机至关重要的零阻力流体力学,就必须能够根据人类的需要自由操纵流动。然而,达朗贝尔悖论和尚未解决的纳维-斯托克斯解决方案(即千年难题)带来了持续的挑战。这些障碍也使不同雷诺数的流体动力零阻力斗篷的开发变得更加复杂。我们的研究引入了一种完全依赖各向同性和均质粘度的零阻力斗篷范例。通过实验和数值验证,我们的斗篷表现出零阻力特性,有效解决了粘性势流中的达朗贝尔悖论。此外,它们还具有随意激活或解除流体动力隐蔽的能力。我们的分析强调了涡度操纵在实现隐形效果和减阻技术中的关键作用。因此,控制涡度成为未来主动流体动力零阻力隐形设计的一个关键方面。总之,我们的研究挑战了 "零阻力不可能 "的普遍观点,为流体力学中的隐形特性提供了有价值的见解,对微流控、要求准确及时释放药物或运输生物分子的生物流控以及超高速技术具有重要意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
On-demand zero-drag hydrodynamic cloaks resolve D'Alembert paradox in viscous potential flows.

The possibility of freely manipulating flow in accordance with humans will remain indispensable for breakthroughs in fields such as microfluidics, nanoengineering, and biomedicines, as well as for realizing zero-drag hydrodynamics, which is essential for alleviating the global energy crisis. However, persistent challenges arise from the D'Alembert paradox and the unresolved Navier-Stokes solutions, known as the Millennium Problem. These obstacles also complicate the development of hydrodynamic zero-drag cloaks across diverse Reynolds numbers. Our research introduces a paradigm for such cloaks, relying exclusively on isotropic and homogeneous viscosity. Through experimental and numerical validations, our cloaks exhibit zero-drag properties, effectively resolving the D'Alembert paradox in viscous potential flows. Moreover, they possess the capability to activate or deactivate hydrodynamic concealment at will. Our analysis emphasizes the critical role of vorticity manipulation in realizing cloaking effects and drag-reduction technology. Therefore, controlling vorticity emerges as a pivotal aspect for future active hydrodynamic zero-drag cloak designs. In conclusion, our study challenges the prevailing belief in the impossibility of zero drag, offering valuable insights into invisibility characteristics in fluid mechanics with implications for microfluidics, biofluidics demanding the drug release or biomolecules transportation accurately and timely, and hypervelocity technologies.

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来源期刊
Microsystems & Nanoengineering
Microsystems & Nanoengineering Materials Science-Materials Science (miscellaneous)
CiteScore
12.00
自引率
3.80%
发文量
123
审稿时长
20 weeks
期刊介绍: Microsystems & Nanoengineering is a comprehensive online journal that focuses on the field of Micro and Nano Electro Mechanical Systems (MEMS and NEMS). It provides a platform for researchers to share their original research findings and review articles in this area. The journal covers a wide range of topics, from fundamental research to practical applications. Published by Springer Nature, in collaboration with the Aerospace Information Research Institute, Chinese Academy of Sciences, and with the support of the State Key Laboratory of Transducer Technology, it is an esteemed publication in the field. As an open access journal, it offers free access to its content, allowing readers from around the world to benefit from the latest developments in MEMS and NEMS.
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