thermal diffusivity

简明释义

热扩散系数

英英释义

例句

1.Researchers measured the thermal diffusivity of various insulative materials to find the best option.

研究人员测量了各种绝缘材料的热扩散率以找到最佳选择。

2.Metals generally have a high thermal diffusivity, making them good conductors of heat.

金属通常具有高热扩散率，使它们成为良好的导热体。

3.The thermal diffusivity of concrete affects its performance in thermal insulation applications.

混凝土的热扩散率影响其在热绝缘应用中的性能。

4.In engineering, knowing the thermal diffusivity helps in designing better heat exchangers.

在工程中，了解热扩散率有助于设计更好的热交换器。

5.The thermal diffusivity of a material determines how quickly it can respond to changes in temperature.

材料的热扩散率决定了它对温度变化的响应速度。

作文

Thermal diffusivity is a crucial property in the study of heat transfer within materials. It describes how quickly heat can spread through a substance, which is essential for understanding thermal management in various applications. The concept of thermal diffusivity (热扩散率) is defined as the ratio of thermal conductivity to the product of density and specific heat capacity. This means that materials with high thermal diffusivity can conduct heat rapidly, making them ideal for applications where quick heat dissipation is necessary. For instance, metals generally have high thermal diffusivity, allowing them to heat up and cool down quickly compared to insulating materials like wood or foam.In engineering, knowing the thermal diffusivity of a material helps designers select appropriate materials for thermal insulation, heating elements, and electronic devices. For example, in electronics, components generate heat during operation, and if not managed properly, can lead to overheating and failure. Engineers use materials with suitable thermal diffusivity to ensure that heat is effectively dissipated, thus maintaining optimal operating temperatures.Furthermore, thermal diffusivity plays a vital role in climate science and meteorology. Understanding how heat diffuses through different layers of the Earth’s surface can provide insights into temperature changes, soil moisture levels, and even plant growth patterns. For instance, researchers studying the effects of climate change often analyze the thermal diffusivity of soil to predict how it will respond to increasing temperatures and changing precipitation patterns.In construction, the thermal diffusivity of building materials impacts energy efficiency. Materials with lower thermal diffusivity help maintain stable indoor temperatures by resisting the flow of heat, thereby reducing the need for heating and cooling systems. This is particularly important in regions with extreme temperatures, where energy efficiency can lead to significant cost savings and environmental benefits.Moreover, the concept of thermal diffusivity is also relevant in food science. When cooking, the rate at which heat penetrates food affects the cooking process. For instance, meats have different thermal diffusivity values based on their composition, which influences how evenly they cook. Understanding these properties can help chefs and food scientists optimize cooking methods to achieve desired textures and flavors.In conclusion, thermal diffusivity (热扩散率) is a fundamental concept that spans multiple disciplines, from engineering and construction to environmental science and culinary arts. Its importance cannot be overstated, as it directly affects the efficiency of heat transfer in various materials and applications. By comprehensively understanding thermal diffusivity, professionals in these fields can make informed decisions that enhance performance, sustainability, and safety. As research continues to advance our knowledge of material properties, the role of thermal diffusivity will undoubtedly remain a key focus in both theoretical studies and practical applications.

热扩散率是在研究材料内热传递时的一个关键属性。它描述了热量在物质中传播的速度，这对于理解各种应用中的热管理至关重要。thermal diffusivity（热扩散率）的概念被定义为热导率与密度和比热容的乘积之比。这意味着具有高thermal diffusivity的材料能够迅速导热，使其成为需要快速散热的应用的理想选择。例如，金属通常具有高thermal diffusivity，使其与木材或泡沫等绝缘材料相比，能够更快地加热和冷却。在工程中，了解材料的thermal diffusivity有助于设计师选择合适的材料用于热绝缘、加热元件和电子设备。例如，在电子产品中，组件在运行过程中会产生热量，如果管理不当，可能导致过热和故障。工程师使用具有合适thermal diffusivity的材料来确保热量有效散发，从而保持最佳操作温度。此外，thermal diffusivity在气候科学和气象学中也发挥着至关重要的作用。了解热量如何在地球表面的不同层次中扩散，可以提供对温度变化、土壤湿度水平甚至植物生长模式的深入见解。例如，研究气候变化影响的研究人员经常分析土壤的thermal diffusivity，以预测它将如何响应日益升高的温度和变化的降水模式。在建筑领域，建筑材料的thermal diffusivity影响能源效率。具有较低thermal diffusivity的材料通过抵抗热流来保持稳定的室内温度，从而减少对供暖和制冷系统的需求。这在气温极端的地区尤其重要，因为能源效率可以带来显著的成本节约和环境效益。此外，thermal diffusivity的概念在食品科学中也相关。当烹饪时，热量渗透食物的速率影响烹饪过程。例如，肉类根据其成分具有不同的thermal diffusivity值，这影响它们的均匀烹饪。了解这些属性可以帮助厨师和食品科学家优化烹饪方法，以达到所需的质地和风味。总之，thermal diffusivity（热扩散率）是一个跨越多个学科的基本概念，从工程和建筑到环境科学和烹饪艺术。它的重要性不容小觑，因为它直接影响着各种材料和应用中的热传递效率。通过全面理解thermal diffusivity，这些领域的专业人士可以做出明智的决策，从而提高性能、可持续性和安全性。随着研究的不断推进，材料属性的知识将继续深化，thermal diffusivity的作用无疑将继续成为理论研究和实际应用的重点。