Related Experiment Video
Updated: Jun 16, 2025
11:34
Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography
Published on: May 15, 2017
11.1K
Localized and delocalized topological modes of heat
Jiaxin Li1, Chengxin Xu2, Zifu Xu1,2
1Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117583, Singapore.
Summary
Researchers introduce a new dimension to diffusion systems, enabling the creation of topological modes in heat transfer. This work paves the way for engineering topological edge states in dynamic diffusion scenarios.
Area of Science:
- Condensed Matter Physics
- Statistical Mechanics
- Materials Science
Background:
- Topological physics has been successfully applied to classical wave systems like photonics, acoustics, and mechanics.
- There is a growing interest in extending topological concepts to diffusion phenomena.
Purpose of the Study:
- To propose and demonstrate a method for realizing topological phenomena in diffusion systems.
- To investigate the transformation of system eigenvalues by introducing an additional real-space dimension.
- To engineer localized and delocalized topological modes in heat transfer.
Main Methods:
- Introducing an additional real-space dimension to diffusion systems.
- Tailoring the effective Hamiltonian using coupling networks.
- Utilizing simulations and experiments in active thermal lattices.
Main Results:
- System eigenvalues are transformed from "imaginary" to "real."
- Localized and delocalized topological modes are successfully realized in heat transfer.
- Experimental validation of the theoretical strategy in active thermal lattices.
Conclusions:
- The proposed approach effectively establishes topological lattices in diffusion systems.
- This work offers insights into engineering topologically protected edge states in dynamic diffusive scenarios.
- The method can be extended to various diffusion systems.
Related Concept Videos
01:19Mechanism 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
01:14Mechanisms of Heat Transfer
292
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...
292
01:14Mechanisms of Heat Transfer I
4.2K
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.
4.2K
01:20Mechanisms 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
01:12Heat Flow and Specific Heat
5.4K
Heat is a type of energy transfer that is caused by a temperature difference, and it can change the temperature of an object. Since heat is a form of energy, its SI unit is the joule (J). Another common unit of energy often used for heat is the calorie (cal), which is defined as the energy needed to change the temperature of 1 g of water by 1 °C, specifically between 14.5 °C and 15.5 °C, since the energy needed shows a slight temperature dependence. Another commonly used unit is...
5.4K
02:46Quantifying Heat
54.2K
Thermal Energy Microscopically, thermal energy is the kinetic energy associated with the random motion of atoms and molecules. Temperature is a quantitative measure of “hot” or “cold”, which depends on the amount of thermal energy. When the atoms and molecules in an object are moving or vibrating quickly, they have a higher average kinetic energy (KE) (or higher thermal energy), and the object is perceived as “hot”, or it is described as being at a...
54.2K