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相关概念视频

Standing Waves in a Cavity01:28

Standing Waves in a Cavity

1.0K
A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
1.0K

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Flow-assisted Dielectrophoresis: A Low Cost Method for the Fabrication of High Performance Solution-processable Nanowire Devices
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使用纳米线在介电流体沸过程中抑制密度波振荡

Harsh Shah1, Vijay Kumar1, Yangying Zhu1

  • 1Department of Mechanical Engineering, University of California─Santa Barbara (UCSB), Santa Barbara, California 93106, United States.

Nano letters
|August 25, 2025
PubMed
概括

微通道中的纳米线表面稳定电子冷却的两相流量. 这项技术可以抑制流动不稳定性,并使用像Opteon SF33这样的介电流体增强热传递.

科学领域:

  • 热管理
  • 微流体学
  • 两相流量

背景情况:

  • 像压力下降振荡这样的流动不稳定性挑战了高热流电子器件的微通道冷却.
  • 研究了表面修改以减轻这些不稳定性,但对介电流体的数据有限.

研究的目的:

  • 通过介电流体研究纳米线表面形态对微通道的流动不稳定性和热传递的影响.
  • 评估纳米线表面在电子设备中可靠的热管理的潜力.

主要方法:

  • 使用纳米线表面结构制造微通道.
  • 使用Opteon SF33进行双相流沸的实验研究.
  • 在不同的热流下分析压力下降,流量和传热特性.

主要成果:

  • 纳米线微通道显著抑制了密度波振荡.
  • 大量流动和压力下降振荡的幅度和频率都降低了.
  • 与标准表面相比,热传递系数得到了提高.
  • 由于表面可湿性改善,观察到稳定的环状流量.

结论:

  • 纳米线表面形态有效稳定微通道中的两相流动不稳定性.
关键词:
纳米线密度波振荡介电流体微通道流沸

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Assembly and Characterization of an External Driver for the Generation of Sub-Kilohertz Oscillatory Flow in Microchannels
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  • 这种方法提高了用介电流体冷却电子设备的热性能和可靠性.
  • 这些发现支持使用工程表面进行先进的热管理解决方案.