heat conduction

简明释义

1. 热传导; 2. 导热; 3. 热导率;

英英释义

例句

1.Insulators are materials that reduce heat conduction (热传导) and help maintain temperature.

绝缘材料是减少热传导的材料，有助于保持温度。

2.In cooking, heat conduction (热传导) allows the pot to evenly distribute heat to the food inside.

在烹饪中，热传导使锅能够均匀地将热量分配给内部的食物。

3.During the experiment, we measured the rate of heat conduction (热传导) through different materials.

在实验中，我们测量了不同材料的热传导速率。

4.The design of the building incorporates heat conduction (热传导) principles to enhance energy efficiency.

建筑设计结合了热传导原理，以提高能源效率。

5.The metal rod is a good conductor of heat, demonstrating efficient heat conduction (热传导) when one end is heated.

金属棒是良好的热导体，当一端加热时，展示了有效的热传导。

作文

Heat is a form of energy that flows from one body to another due to a temperature difference. The process through which this energy transfer occurs is known as heat conduction. 热传导 is the mechanism by which thermal energy moves through materials, and it plays a critical role in everyday life as well as in various scientific applications. To understand heat conduction, we must first recognize that all matter is made up of atoms and molecules that are in constant motion. When these particles move, they collide with each other, transferring energy in the process. This is particularly important when discussing solids, where the closely packed atoms allow for efficient energy transfer. For instance, when one end of a metal rod is heated, the particles at that end gain energy and vibrate more vigorously. These energetic particles then collide with neighboring particles, passing on their energy and causing the entire rod to eventually reach a higher temperature. This phenomenon exemplifies heat conduction in action.The rate of heat conduction depends on several factors, including the material's thermal conductivity, the temperature gradient, and the surface area through which heat is being transferred. Different materials have different thermal conductivities; metals, for example, typically have high thermal conductivity, meaning they conduct heat efficiently. In contrast, insulating materials like wood or rubber have low thermal conductivity, making them poor conductors of heat. This property is why we use materials like fiberglass or foam in building construction to minimize unwanted heat transfer.In practical terms, heat conduction is vital in numerous applications. For instance, in cooking, pots and pans are designed to conduct heat evenly to ensure that food is cooked properly. The choice of materials in cookware can significantly affect cooking performance. On the other hand, understanding heat conduction is also crucial in engineering, especially in designing systems that involve heat exchangers, such as those found in power plants or refrigeration units. Engineers must consider how heat will be conducted through various materials to optimize efficiency and safety.Moreover, heat conduction is not limited to solids; it can occur in liquids and gases as well, although the mechanisms differ slightly. In liquids, convection currents can enhance heat transfer, while in gases, the process can be slower due to the larger distances between particles. Nonetheless, the fundamental principle remains the same: energy is transferred from areas of higher temperature to areas of lower temperature until thermal equilibrium is reached.In conclusion, heat conduction is a fundamental concept in physics that describes the transfer of thermal energy through materials. Its understanding is essential not only in scientific research but also in practical applications across various fields, including cooking, engineering, and construction. By grasping the principles of heat conduction, we can better appreciate how energy flows in our environment and how we can manipulate it for our benefit.

热是一种能量形式，由于温度差异而从一个物体流向另一个物体。这个能量转移发生的过程被称为热传导。热传导是热能通过材料移动的机制，它在日常生活以及各种科学应用中发挥着关键作用。要理解热传导，我们必须首先认识到所有物质都是由原子和分子组成的，这些原子和分子处于不断运动之中。当这些粒子运动时，它们会相互碰撞，从而在此过程中转移能量。这一点在讨论固体时尤为重要，因为紧密排列的原子允许高效的能量转移。例如，当金属棒的一端被加热时，该端的粒子获得能量并剧烈振动。这些活跃的粒子随后与邻近的粒子碰撞，传递它们的能量，使整个棒最终达到更高的温度。这一现象示范了热传导的实际运作。热传导的速度取决于几个因素，包括材料的热导率、温度梯度和热量传递的表面积。不同材料具有不同的热导率；例如，金属通常具有高热导率，这意味着它们有效地导热。相比之下，木材或橡胶等绝缘材料的热导率较低，使它们成为热导体差的材料。这一特性就是为什么我们在建筑施工中使用玻璃纤维或泡沫等材料，以最小化不必要的热转移。在实际应用中，热传导在众多应用中至关重要。例如，在烹饪中，锅具的设计旨在均匀导热，以确保食物得到适当的烹饪。锅具材料的选择可以显著影响烹饪性能。另一方面，理解热传导在工程学中也至关重要，特别是在设计涉及热交换器的系统时，例如发电厂或制冷装置中的热交换器。工程师必须考虑热量如何通过各种材料进行导热，以优化效率和安全性。此外，热传导并不限于固体；它也可以在液体和气体中发生，尽管机制略有不同。在液体中，对流电流可以增强热传递，而在气体中，由于粒子之间的距离较大，这一过程可能较慢。然而，基本原理仍然相同：能量从高温区域转移到低温区域，直到达到热平衡。总之，热传导是物理学中的一个基本概念，描述了热能通过材料转移的过程。掌握这一概念不仅对科学研究至关重要，而且在烹饪、工程和建筑等多个领域的实际应用中也是如此。通过理解热传导的原理，我们可以更好地理解能量在环境中的流动，以及我们如何利用它来造福自己。