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Related Concept Videos

Mechanisms of Heat Transfer I01:14

Mechanisms of Heat Transfer I

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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.
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Mechanisms of Heat Transfer II01:20

Mechanisms of Heat Transfer II

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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...
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Mechanism of heat transfer01:19

Mechanism of heat transfer

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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...
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Mechanisms of Heat Transfer01:14

Mechanisms of Heat Transfer

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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...
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Conduction, Convection and Radiation: Problem Solving01:20

Conduction, Convection and Radiation: Problem Solving

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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...
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Radiation: Applications01:17

Radiation: Applications

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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...
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Demonstrating the Simplicity and In Situ Temperature Monitoring of the Mechanochemical Synthesis of Metal Chalcogenides Suitable for Thermoelectrics
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Demonstrating the Simplicity and In Situ Temperature Monitoring of the Mechanochemical Synthesis of Metal Chalcogenides Suitable for Thermoelectrics

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Radiative Heat Transfer and 2D Transition Metal Dichalcogenide Materials.

Long Ma1, Dai-Nam Le1, Lilia M Woods1

  • 1Department of Physics, University of South Florida, Tampa, Florida 33620, United States.

The Journal of Physical Chemistry Letters
|October 23, 2025
PubMed
Summary
This summary is machine-generated.

This study explores radiative heat transfer in transition metal dichalcogenide monolayers, revealing how their unique properties can enhance energy harvesting. Findings offer insights into designing materials for efficient thermal energy applications.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Nanotechnology

Background:

  • Radiative heat transfer is crucial for fundamental science and energy harvesting.
  • Material properties like plasmonic excitations and hyperbolicity significantly influence heat transfer, especially in the near-field regime.
  • Reduced-dimension materials, such as monolayers, offer potential for enhanced radiative heat transfer compared to bulk materials.

Purpose of the Study:

  • To investigate radiative heat transfer power in transition metal dichalcogenide (TMD) monolayers.
  • To understand scaling laws for metals and semiconductors in this context.
  • To identify material-specific signatures that can be controlled to optimize radiative heat transfer.

Main Methods:

  • Utilized first-principles calculations to compute electronic and optical properties of TMD monolayers.
  • Employed effective models to analyze radiative heat transfer based on computed properties.
  • Combined analytical modeling with ab initio simulation results.

Main Results:

  • Identified distinct radiative heat transfer behaviors in H- and T-symmetric TMD monolayers.
  • Revealed emerging scaling laws for radiative heat transfer in metallic and semiconducting TMDs.
  • Demonstrated that specific material properties act as control knobs for heat transfer.

Conclusions:

  • Transition metal dichalcogenide monolayers exhibit tunable radiative heat transfer properties.
  • The study provides a framework for designing materials for enhanced thermal energy applications.
  • The combined computational and modeling approach can be extended to create a materials database for radiative heat transfer.