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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
Maxwell-Boltzmann Distribution: Problem Solving01:20

Maxwell-Boltzmann Distribution: Problem Solving

1.5K
Individual molecules in a gas move in random directions, but a gas containing numerous molecules has a predictable distribution of molecular speeds, which is known as the Maxwell-Boltzmann distribution, f(v).
This distribution function f(v) is defined by saying that the expected number N (v1,v2) of particles with speeds between v1 and v2 is given by
1.5K
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...
3.3K
Radiation Pressure: Problem Solving01:09

Radiation Pressure: Problem Solving

368
The radiation pressure applied by an electromagnetic wave on a perfectly absorbing surface equals the energy density of the wave. The wave's momentum also gets transferred to the surface when an electromagnetic wave is entirely absorbed by it. The rate at which momentum is transmitted to an absorbing surface perpendicular to the propagation direction equals the force on the surface.
The average value of the rate of momentum transfer divided by the absorbing area represents the average force...
368
Mechanisms of Heat Transfer I01:14

Mechanisms of Heat Transfer I

4.3K
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.
4.3K
Mechanisms of Heat Transfer01:14

Mechanisms of Heat Transfer

331
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...
331

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相关实验视频

Updated: Jul 7, 2025

Author Spotlight: Computing the Effects of a Local Radiofrequency Hyperthermia Intervention on Tumor Biomechanics
10:23

Author Spotlight: Computing the Effects of a Local Radiofrequency Hyperthermia Intervention on Tumor Biomechanics

Published on: December 1, 2023

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进化计算用于使用基因算法基于神经网络的潮湿波状的辐射 - 传导热传输.

B S Poornima1, Ioannis E Sarris2, K Chandan1

  • 1Department of Mathematics, Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Bengaluru 560035, Karnataka, India.

Biomimetics (Basel, Switzerland)
|December 22, 2023
PubMed
概括
此摘要是机器生成的。

这项研究使用遗传算法对被潮湿的波状进行热变异建模,发现温度随着潮湿和对流导电参数的增加而下降. 遗传算法增强了人工神经网络的预测准确性.

关键词:
人工神经网络的人工神经网络遗传算法是一种遗传算法.传热传热传热传热传热传热传热传热波浪般的翅膀 波浪般的翅膀湿的翅膀可以.

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Author Spotlight: Simulation and Analysis of the Temperature Rise of Ring Main Unit Equipment
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相关实验视频

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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:

  • 热传递是一种热传递.
  • 优化算法 优化算法
  • 计算流体动力学的流体动力学.

背景情况:

  • 进化算法模仿自然选择进行优化.
  • 潮湿的波涉及复杂的对流和辐射热传递.
  • 人工神经网络 (ANN) 的参数估计需要强大的优化.

研究的目的:

  • 为了研究湿湿的波表面上的热变化.
  • 在ANN中应用遗传算法 (GA) 进行参数估计.
  • 在潮湿表面条件下模拟对流和辐射热传递.

主要方法:

  • 用一个遗传算法来优化ANN参数.
  • 治理的常规微分方程被转化为一个无维形式.
  • 对各种非维度变量分析了热谱.

主要成果:

  • 温度概况随着湿度参数的增加而下降.
  • 较高的对流-导电参数也导致较低的温度配置.
  • 该GA证明了ANN的有效参数调整,提高了准确性和趋同性.

结论:

  • 遗传算法是优化热传输问题的ANN模型的强大工具.
  • 了解湿条件下的热行为对于设计至关重要.
  • 该研究提供了一种经过验证的方法,用于使用ANN预测热性能.