タースト付きの熱放射線

Sathwik Bharadwaj¹, Zubin Jacob¹

¹School of Electrical and Computer Engineering, Birck Nanotechnology Center, Purdue University, West Lafayette, IN, USA.

Science (New York, N.Y.)

|December 19, 2024

まとめ

歪んだ炭素ナノチューブフィラメントは高温で回転する熱波を生成しますこの発見はナノ物質の熱伝達に関する新たな洞察をもたらします

科学分野:

材料科学
ナノテクノロジー
物理学

背景:

炭素ナノチューブ (CNT) は,ユニークな熱特性を持つ高度なナノ材料です.
ナノ構造の熱的振る舞いを理解することは新しい技術の開発に不可欠です

研究の目的:

カーボンナノチューブフィラメントの熱放出特性を研究する.
高温でCNTで回転する熱波の現象を研究する.

主な方法:

特定の歪んだ幾何学を持つ炭素ナノチューブフィラメントの製造
高温実験で熱の放射を測定する.
熱波の拡散と特徴の分析

主要な成果:

カーボンナノチューブフィラメントは歪んだ幾何学で成功裏に製造されました
高温でこれらのフィラメントから放出される回転する熱波の観測.
放射される熱波の周波数と振幅の特徴.

結論:

カーボンナノチューブフィラメントの歪んだ幾何学は,その熱放出に大きく影響する.
旋回熱波は,CNTにおける新しい熱伝達方式を表しています.
研究結果は,人工ナノマテリアルを用いた新しい熱管理アプリケーションの基礎となる.

さらに関連する動画

08:52

Near-Infrared Temperature Measurement Technique for Water Surrounding an Induction-heated Small Magnetic Sphere

Published on: April 30, 2018

8.1K

09:01

High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings

Published on: April 16, 2017

7.7K

関連する概念動画

01:20

Mechanisms of Heat Transfer II

3.2K

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...

3.2K

01:17

Radiation: Applications

1.1K

The average temperature of Earth is the subject of much current discussion. Earth is in radiative contact with both the Sun and dark space; it receives almost all its energy from the radiation of the Sun and reflects some of it into outer space. Dark space is very cold, about 3 K, so Earth radiates energy into it. For instance, heat transfer occurs from soil and grasses, the rate of which can be so rapid that frost can occur on clear summer evenings, even in warm latitudes.
The average...

1.1K

01:05

Absorption of Radiation

703

The rate of heat transfer by emitted radiation is described by the Stefan-Boltzmann law of radiation:

703

01:10

Dual Nature of Electromagnetic (EM) Radiation

1.9K

Electromagnetic (EM) radiation consists of electric and magnetic field components oscillating in planes perpendicular to each other and mutually perpendicular to radiation propagation through space. EM radiation can be classified as a wave, characterized by the properties of waves such as wavelength (denoted as λ) and frequency (represented by ν).
Wavelength is the distance between two consecutive peaks (the highest point) or troughs (the lowest point) in the wave. Frequency is the...

1.9K

01:19

Mechanism of heat transfer

1.2K

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...

1.2K

01:14

Mechanisms of Heat Transfer I

4.1K

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.