heat conduction

简明释义

热传导

英英释义

例句

1.In thermal insulation, minimizing heat conduction is crucial to maintaining temperature.

在热绝缘中，减少热传导对保持温度至关重要。

2.The efficiency of a heat sink depends on its ability to facilitate heat conduction.

散热器的效率取决于其促进热传导的能力。

3.When you touch a hot surface, heat conduction transfers energy from the surface to your skin.

当你触摸一个热表面时，热传导将能量从表面传递到你的皮肤。

4.The process of heat conduction is essential for cooking food evenly.

食物均匀烹饪的过程离不开热传导。

5.Metals are good conductors because they allow heat conduction to occur rapidly.

金属是良好的导体，因为它们能迅速进行热传导。

作文

Heat is a form of energy that can be transferred from one object to another. One of the primary mechanisms of this transfer is through heat conduction, which is the process by which thermal energy moves through materials without any movement of the material itself. This phenomenon occurs at the microscopic level, where faster-moving particles collide with slower-moving ones, transferring their energy in the process. Heat conduction is an essential concept in physics and engineering, as it plays a crucial role in various applications, from cooking to building design.To understand heat conduction, we must first consider how heat flows. When two objects at different temperatures come into contact, heat will flow from the hotter object to the cooler one until they reach thermal equilibrium. This transfer of energy happens because the faster-moving particles in the hotter object collide with the slower-moving particles in the cooler object, causing them to gain energy and increase in temperature. The rate of heat conduction depends on several factors, including the materials involved, the temperature difference, and the surface area of contact.Different materials conduct heat at different rates. Metals, for example, are known for their high thermal conductivity, meaning they can transfer heat quickly and efficiently. This is why metal pots and pans are often used for cooking; they allow heat to spread evenly across their surfaces, ensuring that food cooks uniformly. On the other hand, insulators like wood or plastic have low thermal conductivity, making them poor conductors of heat. These materials are often used in construction to help maintain temperature control within buildings by reducing unwanted heat loss or gain.The mathematical expression for heat conduction is described by Fourier's law, which states that the rate of heat transfer through a material is proportional to the negative gradient of temperature and the area through which the heat is flowing. In simpler terms, this means that the greater the temperature difference and the larger the area, the more heat will be conducted. Understanding this principle is vital for engineers and architects when designing heating and cooling systems in buildings, as they need to ensure that energy is used efficiently.In practical applications, heat conduction is also significant in everyday life. For instance, when you touch a hot stove, your skin absorbs heat through conduction, which can result in burns if the temperature is too high. Similarly, when you hold a cold drink, the heat from your hand is conducted away, making the drink feel cooler. This simple interaction demonstrates the importance of heat conduction in our daily experiences.In conclusion, heat conduction is a fundamental process that governs how heat energy is transferred through materials. Its understanding is critical in various fields, including physics, engineering, and even culinary arts. By recognizing how different materials conduct heat and the principles behind this transfer, we can make more informed decisions in both our professional and personal lives. Whether it's selecting the right cookware or designing energy-efficient buildings, the knowledge of heat conduction is invaluable and affects many aspects of our daily existence.

热是一种能量形式，可以从一个物体转移到另一个物体。这种转移的主要机制之一是通过热传导，即热能在材料中移动而不伴随材料本身的运动的过程。这一现象发生在微观层面上，快速运动的粒子与较慢运动的粒子碰撞，在此过程中转移它们的能量。热传导是物理学和工程学中的一个重要概念，因为它在从烹饪到建筑设计等各种应用中发挥着关键作用。要理解热传导，我们首先必须考虑热如何流动。当两个不同温度的物体接触时，热量将从较热的物体流向较冷的物体，直到它们达到热平衡。这种能量的转移发生是因为较热物体中运动较快的粒子与较冷物体中运动较慢的粒子碰撞，使它们获得能量并温度升高。热传导的速率取决于多个因素，包括所涉及的材料、温度差异和接触表面积。不同材料的热导率不同。例如，金属以其高热导率而闻名，这意味着它们可以快速有效地传导热量。这就是为什么金属锅具通常用于烹饪的原因；它们允许热量均匀地分布在表面上，确保食物均匀烹饪。另一方面，木材或塑料等绝缘体具有低热导率，使它们成为热的较差导体。这些材料通常用于建筑中，以帮助控制建筑内部的温度，通过减少不必要的热量损失或增益。热传导的数学表达式由傅里叶定律描述，该定律指出，通过材料的热转移速率与温度的负梯度及热量流动的面积成正比。简单来说，这意味着温度差越大，面积越大，传导的热量就越多。理解这一原理对工程师和建筑师在设计建筑的供暖和制冷系统时至关重要，因为他们需要确保能源得到有效利用。在实际应用中，热传导在日常生活中也非常重要。例如，当你触摸热炉时，你的皮肤通过传导吸收热量，如果温度过高可能会导致烧伤。同样，当你拿着冷饮时，手中的热量被传导出去，使饮料感觉更凉。这种简单的互动展示了热传导在我们日常体验中的重要性。总之，热传导是一个基本过程，决定了热能如何通过材料转移。它的理解在物理学、工程学甚至烹饪艺术等多个领域都至关重要。通过认识不同材料如何导热以及这种转移背后的原理，我们可以在职业和个人生活中做出更明智的决策。无论是选择合适的炊具还是设计节能建筑，了解热传导都是无价的，并影响着我们日常生活的许多方面。