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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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Heat transfer between the human body and its environment occurs through four main mechanisms: conduction, convection, radiation, and evaporation.
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Mechanisms of Heat Transfer II01:20

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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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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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Radiation: Applications01:17

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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.
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Enhancing radiative heat transfer with meta-atomic displacement.

Cheng-Long Zhou1,2, Shuihua Yang3, Yang Huang4

  • 1School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.

Nanophotonics (Berlin, Germany)
|November 17, 2025
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Summary
This summary is machine-generated.

Researchers developed a novel meta-atomic displacement strategy to enhance radiative heat transfer. This method moves beyond geometric limitations, enabling superior thermal performance in metastructures for advanced energy devices.

Keywords:
heat transfermeta-atomic displacementthermophotonics

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Area of Science:

  • Thermal Engineering
  • Metamaterials Science
  • Nanoscale Heat Transfer

Background:

  • Controlling radiative heat transfer is crucial for technological progress.
  • Metastructures traditionally rely on geometric design for thermal manipulation.
  • Geometric optimization faces limitations due to localized modes in meta-atoms.

Purpose of the Study:

  • To introduce a new strategy for superior radiative heat transfer control.
  • To overcome the limitations of geometric optimization in metastructures.
  • To enhance thermal performance without complex structural designs.

Main Methods:

  • Proposing a comprehensive strategy based on interatomic displacement in metastructures.
  • Shifting from localized resonances to extended nonlocal resonant modes.
  • Inducing strong interactions among neighboring meta-atoms.

Main Results:

  • Achieved superior radiative heat transfer performance.
  • Enabled extended nonlocal resonant modes through interatomic displacement.
  • Demonstrated radiative heat conductance surpassing previously reported geometrical structures.
  • Showcased the strategy's applicability across various metastructures.

Conclusions:

  • Interatomic displacement offers a powerful approach to control radiative heat transfer.
  • This strategy overcomes limitations of purely geometric designs.
  • The method has significant implications for thermal science and energy devices.