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相关概念视频

Frost Action on Concrete01:27

Frost Action on Concrete

92
Concrete structures in cold climates, such as those along roadsides, can retain moisture. This moisture makes them susceptible to frost-related damage when temperatures fall below freezing. Adding moisture worsens the damage during temperature fluctuations, leading to repeated freezing and thawing. De-icing salts, spread over these structures to melt ice, add to the freeze-thaw cycle, and draw even more moisture into the concrete.
This freeze-thaw cycle primarily causes surface scaling, where...
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Freezing Point Depression and Boiling Point Elevation03:12

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Boiling Point Elevation
The boiling point of a liquid is the temperature at which its vapor pressure is equal to ambient atmospheric pressure. Since the vapor pressure of a solution is lowered due to the presence of nonvolatile solutes, it stands to reason that the solution’s boiling point will subsequently be increased. Vapor pressure increases with temperature, and so a solution will require a higher temperature than will pure solvent to achieve any given vapor pressure, including one...
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相关实验视频

Updated: Jun 5, 2025

Fabrication of Superhydrophobic Metal Surfaces for Anti-Icing Applications
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Fabrication of Superhydrophobic Metal Surfaces for Anti-Icing Applications

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用滴滴去变形冰的方法

Duco van Buuren1, Pallav Kant2, Jochem G Meijer1

  • 1Physics of Fluids group, <a href="https://ror.org/02n9d1732">Max Planck Center Twente for Complex Fluid Dynamics</a>, Department of Science and Technology, Mesa+ Institute and J. M. Burgers Center for Fluid Dynamics, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.

Physical review letters
|December 6, 2024
PubMed
概括
此摘要是机器生成的。

由于热马兰戈尼力,固化前沿在水滴/气泡周围变形不同. 这种互动互动.

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科学领域:

  • 物理 物理学 物理
  • 材料科学 材料科学 材料科学
  • 流体动力学 流体动力学

背景情况:

  • 固化前线在与不溶性颗粒相互作用时变形.
  • 热传递决定了固体颗粒的变形,独立于接近速度.

研究的目的:

  • 调查固化前线与水滴或气泡相互作用的独特变形行为.
  • 了解界面动力学和热马兰戈尼力作用.

主要方法:

  • 实验研究的结合.实验研究的结合.
  • 理论分析. 理论分析.
  • 数字模拟 数字模拟.

主要成果:

  • 滴滴/泡泡与凝固前线的相互作用显示出意想不到的变形行为.
  • 热马兰戈尼力被确定为关键机制.
  • 前部变形量取决于传播速度和热梯度.
  • 变形可以在更高的速度从吸引转变为排斥.

结论:

  • 界面动力学,特别是热马兰戈尼力,控制着自由界面粒子周围的凝固前变形.
  • 固化前线的反应对传播速度敏感,可以控制相互作用结果.