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相关概念视频

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...
3.2K
Heat Flow and Specific Heat01:12

Heat Flow and Specific Heat

5.3K
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...
5.3K
Conduction, Convection and Radiation: Problem Solving01:20

Conduction, Convection and Radiation: Problem Solving

1.2K
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...
1.2K
Mechanisms of Heat Transfer01:14

Mechanisms of Heat Transfer

266
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...
266
Heating and Cooling Curves02:44

Heating and Cooling Curves

22.5K
When a substance—isolated from its environment—is subjected to heat changes, corresponding changes in temperature and phase of the substance is observed; this is graphically represented by heating and cooling curves.
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...
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相关实验视频

Updated: Jun 6, 2025

Surrogate Model Development for Digital Experiments in Welding
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Surrogate Model Development for Digital Experiments in Welding

Published on: March 28, 2025

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基于深度学习的造过程的传热模拟.

Jinwu Kang1, Jiwu Wang2, Xiao Han2

  • 1School of Materials Science and Engineering, Key Laboratory for Advanced Materials Processing Technology, Tsinghua University, Beijing, 100084, China. kangjw@tsinghua.edu.cn.

Scientific reports
|November 23, 2024
PubMed
概括
此摘要是机器生成的。

深度学习模型快速预测造的固化温度,达到94.5%的准确度. 这样可以避免对复杂的造工艺进行漫长的模拟.

关键词:
造 造 造 造深度学习是一种深度学习.模拟模拟是为了模拟.温度场是一个温度场.在U-net中,U-net是指U-net网络.

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Author Spotlight: Simulation and Analysis of the Temperature Rise of Ring Main Unit Equipment
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Pool-Boiling Heat-Transfer Enhancement on Cylindrical Surfaces with Hybrid Wettable Patterns
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相关实验视频

Last Updated: Jun 6, 2025

Surrogate Model Development for Digital Experiments in Welding
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Surrogate Model Development for Digital Experiments in Welding

Published on: March 28, 2025

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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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Pool-Boiling Heat-Transfer Enhancement on Cylindrical Surfaces with Hybrid Wettable Patterns
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科学领域:

  • 材料科学 材料科学 材料科学
  • 计算科学 计算科学
  • 人工智能的人工智能

背景情况:

  • 造固化的数值模拟是计算密集且耗时的.
  • 现有的方法往往需要复杂的宪法模型.
  • 准确预测温度场对于优化造工艺至关重要.

研究的目的:

  • 开发一种快速而准确的方法,用于在造固化过程中预测温度场.
  • 为了克服传统数值模拟技术的局限性.
  • 利用深度学习进行有效的造热分析.

主要方法:

  • 开发了经过修改的U-net网络架构,其中包括Inception和Convolutional Block Attention Module (CBAM) 模块.
  • 从200个不同的几何模型中生成训练数据,其中包括造,模具和冷却部件.
  • 使用有限差异方法 (FDM) 模拟来获得训练数据的温度场.
  • 训练有素的深度学习模型可以从时间ti+1的输入中预测时间ti+1的温度场.

主要成果:

  • 实现了94.5%的平均预测准确度,绝对温度误差为7°C.
  • 演示了快速预测能力,每次时间步骤预测只需要一秒.
  • 成功处理复杂的多组件和多材料几何形状,包括造,冷却和模具.
  • 模型表现出在预测不同时间点任意形状件的温度场的熟练程度.

结论:

  • 深度学习模型为造固化的传统数值模拟提供了一个快速而准确的替代方案.
  • 拟议的U-net架构与Inception和CBAM模块有效预测复杂的造场景中的温度场.
  • 这种方法显著降低了计算成本和时间,使造过程的优化速度更快.