用于增强非里埃热传输的热元材料
Harry Mclean1, Francis Huw Davies1, Ned Thaddeus Taylor1
1Department of Physics and Astronomy, University of Exeter, Exeter, UK.
NPJ metamaterials
|November 24, 2025
概括
量身定制的热元材料表现出增强的非里埃热传输,暂时捕获热量. 这项研究将粒子动态与宏观热流联系起来,使先进的热管理成为可能.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
- 热力学是一种热力学.
背景情况:
- 里埃定律限制了对小规模热传输的理解.
- 对于热元材料,需要非里埃热传输理论.
- 像Cattaneo这样的现有模型有局限性.
研究的目的:
- 为了证明材料模式如何改变热传输动态.
- 为了将声子散射与宏观热量流的桥梁.
- 从粒子动态学中推导出超标卡塔内奥模型.
主要方法:
- 新的扰动理论方法.
- 微尺度的图案系统.微尺度的图案系统.
- 将声子散射机制与宏观热量流的桥梁.
主要成果:
- 量身定制的图案增强了非里埃热传输.
- 由于修改的动力学,热量暂时被困.
- 内部接口介导波形能量传播.
- 建立了放松时间和声寿命之间的直接联系.
结论:
- 统一的框架将微尺度相互作用与宏观运输联系起来.
- 解决了卡塔内奥模型的局限性.
- 突出了热元材料在超快速热管理和纳米级能源应用中的潜力.
相关概念视频
01:20Mechanisms of Heat Transfer II
4.2K
In convection, thermal energy is carried by the large-scale flow of matter. Ocean currents and large-scale atmospheric circulation, which result from the buoyancy of warm air and water, transfer hot air from the tropics toward the poles and cold air from the poles toward the tropics. The Earth’s rotation interacts with those flows, causing the observed eastward flow of air in the temperate zones. Convection dominates heat transfer by air, and the amount of available space for the airflow...
4.2K
01:14Mechanisms of Heat Transfer
1.6K
Heat transfer between the human body and its environment occurs through four main mechanisms: conduction, convection, radiation, and evaporation.
Conduction, accounting for approximately 3% of body heat loss at rest, is the process of exchanging heat between molecules of two materials in direct contact. This can result in both heat loss and gain. For instance, when the body is submerged in water, which conducts heat 20 times more effectively than air, it can either lose or gain significant...
Conduction, accounting for approximately 3% of body heat loss at rest, is the process of exchanging heat between molecules of two materials in direct contact. This can result in both heat loss and gain. For instance, when the body is submerged in water, which conducts heat 20 times more effectively than air, it can either lose or gain significant...
1.6K
01:19Mechanism of heat transfer
1.8K
Understanding heat transfer mechanisms is essential for understanding how our bodies maintain balance in different environmental conditions. When the environment is thermoneutral, the body is in a state of balance, neither using nor releasing energy to maintain its core temperature. However, when the environment is not thermoneutral, the body employs four heat transfer mechanisms to maintain homeostasis: conduction, convection, evaporation, and radiation. These mechanisms facilitate heat...
1.8K
01:14Mechanisms of Heat Transfer I
5.9K
Just as interesting as the effects of heat transfer on a system are the methods by which the heat transfer occur. Whenever there is a temperature difference, heat transfer occurs. It may occur rapidly, such as through a cooking pan, or slowly, such as through the walls of a picnic ice box. So many processes involve heat transfer that it is hard to imagine a situation where no heat transfer occurs. Yet, every heat transfer takes place by only three methods: conduction, convection, and radiation.
5.9K
01:21Joule-Thomson Effect
9.0K
The Joule-Thomson effect, also known as the Joule-Kelvin effect, describes the temperature change of a fluid when it is forced through a valve or porous plug while keeping it in a thermally insulated environment. This experiment is called a throttling process. This is an important effect widely used in refrigeration and the liquefaction of gases.
This experiment forces high-pressure gas through a throttle valve or a porous plug to a lower-pressure region. The gas expands as it passes through to...
This experiment forces high-pressure gas through a throttle valve or a porous plug to a lower-pressure region. The gas expands as it passes through to...
9.0K
01:20Conduction, Convection and Radiation: Problem Solving
2.2K
There are three methods by which heat transfer can take place: conduction, convection, and radiation. Each method has unique and interesting characteristics, but all three have two things in common: they transfer heat solely because of a temperature difference; and the greater the temperature difference, the faster the heat transfer.
In order to solve a problem related to heat transfer, first of all, the situation needs to be examined to determine the type of heat transfer involved. This could...
In order to solve a problem related to heat transfer, first of all, the situation needs to be examined to determine the type of heat transfer involved. This could...
2.2K