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相关概念视频

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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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.
4.0K
Mechanisms of Heat Transfer01:14

Mechanisms of Heat Transfer

85
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...
85
Conduction, Convection and Radiation: Problem Solving01:20

Conduction, Convection and Radiation: Problem Solving

1.1K
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...
1.1K
Mechanism of heat transfer01:19

Mechanism of heat transfer

1.1K
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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Thermal expansion and Thermal stress: Problem Solving01:27

Thermal expansion and Thermal stress: Problem Solving

1.1K
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...
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相关实验视频

Updated: May 7, 2025

Author Spotlight: Simulation and Analysis of the Temperature Rise of Ring Main Unit Equipment
04:35

Author Spotlight: Simulation and Analysis of the Temperature Rise of Ring Main Unit Equipment

Published on: July 5, 2024

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一个封闭盒子内核函数用于数值模拟短暂的传热传导.

Yalong Zhang1, Jun Yang2, Xinjiang Zhang2

  • 1College of Electrical and Information Engineering, Quzhou University, Quzhou, 324000, China. 37088@qzc.edu.cn.

Scientific reports
|December 29, 2024
PubMed
概括

一个新的封闭盒子内核功能可以有效和准确地对短暂热传导进行数值模拟. 这种方法可以加速使用图形处理单元 (GPU) 的计算,并减少实际工程应用中的错误.

关键词:
热传导方程 热传导方程核心的功能. 核心的功能.数字模拟 数字模拟部分微分方程部分微分方程.过渡式传导热的传导.

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相关实验视频

Last Updated: May 7, 2025

Author Spotlight: Simulation and Analysis of the Temperature Rise of Ring Main Unit Equipment
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Author Spotlight: Simulation and Analysis of the Temperature Rise of Ring Main Unit Equipment

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科学领域:

  • 数字分析 数字分析
  • 计算物理学的计算物理.
  • 热传递是一种传递热量的过程.

背景情况:

  • 对于许多工程应用来说,精确模拟短暂热传导是至关重要的.
  • 现有的数值方法可能是计算密集型和耗时的.

研究的目的:

  • 开发一种新的,高效的,准确的数值方法来模拟短暂的热传导.
  • 为了实现更快,更通用的模拟,适用于各种材料和场景.

主要方法:

  • 引入了一种新的"封闭盒子内核功能",用于短暂的热传导.
  • 每个时间步骤的单点空间温度解决方案,消除代过程.
  • 使用图形处理单元 (GPU) 实现并行计算,以提高性能.

主要成果:

  • 在24700次代后,实现了高精度,相对误差为0.000072.
  • 显示了显著的加快速度,平均比中央处理器 (CPU) 计算速度快94.0712倍.
  • 通过数学示例和实际的计算框架来验证正确性和准确性.

结论:

  • 封闭盒子内核功能提供了一种通用,准确和计算效率高的方法来模拟短暂的传热.
  • 该方法适用于GPU并行计算,显著提高了模拟速度.
  • 开发的框架为需要快速精确的热分析的工程应用提供了实用工具.