Related Experiment Video
Updated: Oct 20, 2025
05:20
Characterization of Thermal Transport in One-dimensional Solid Materials
Published on: January 26, 2014
17.8K
Interface thermal resistance induced by geometric shape mismatch: A multiparticle Lorentz gas model.
Tingting Wang1, Yu Yang1, Yuancheng Wu1
1NNU-SULI Thermal Energy Research Center (NSTER) and Center for Quantum Transport and Thermal Energy Science (CQTES), School of Physics and Technology, Nanjing Normal University, Nanjing 210023, China.
Physical Review. E
|September 16, 2021
Summary
Interface thermal resistance (ITR) in homogeneous stepped systems can be caused by geometric mismatch, not just material differences. Reducing this mismatch lowers ITR and can create thermal rectification effects.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Nanotechnology
Background:
- Interface thermal resistance (ITR), or Kapitza resistance, hinders heat dissipation in integrated circuits.
- Conventional ITR studies focus on dissimilar material interfaces.
Purpose of the Study:
- Investigate ITR in homogeneous stepped systems.
- Explore ITR induced by geometric mismatch.
- Analyze thermal rectification effects in such systems.
Main Methods:
- Utilized the multiparticle Lorentz gas model.
- Simulated heat transport in homogeneous stepped structures.
Main Results:
- ITR can arise from pure geometric shape mismatch.
- ITR decreases with reduced geometric mismatch.
- Asymmetrical ITR for forward/backward transport leads to thermal rectification.
- Analyzed effects of width, temperature, and temperature difference on ITR and rectification.
Conclusions:
- Geometric mismatch is a novel source of ITR.
- ITR in homogeneous stepped systems offers new insights into interfacial thermal transport.
- Potential for designing materials with tunable thermal properties.
Related Concept Videos
01:16Thermal Sigmatropic Reactions: Overview
2.2K
Sigmatropic rearrangements are a class of pericyclic reactions in which a σ bond migrates from one part of a π system to another. These are intramolecular rearrangements where the total number of σ and π bonds remain unchanged.
Sigmatropic shifts are classified based on an order term [i, j ], where i and j indicate the number of atoms across which each end of the σ bond migrates. Below are examples of a [3,3] sigmatropic shift in...
Sigmatropic shifts are classified based on an order term [i, j ], where i and j indicate the number of atoms across which each end of the σ bond migrates. Below are examples of a [3,3] sigmatropic shift in...
2.2K
01:14Mechanisms of Heat Transfer I
5.0K
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.
5.0K
01:20Mechanisms of Heat Transfer II
3.7K
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...
3.7K
01:21Joule-Thomson Effect
6.2K
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...
6.2K
01:27Thermal expansion and Thermal stress: Problem Solving
1.5K
San Francisco's Golden Gate Bridge is exposed to temperatures ranging from -15 °C to 40 °C. At its coldest, the main span of the bridge is 1275 m long. Assuming that the bridge is made entirely of steel, what is the change in its length between these temperatures?
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in...
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in...
1.5K
01:14Mechanisms of Heat Transfer
727
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...
727