heat convection

简明释义

热对流

英英释义

例句

1.Engine cooling systems rely on heat convection 热对流 to dissipate heat away from the engine components.

发动机冷却系统依赖于热对流 热对流将热量散发到发动机部件之外。

2.In buildings, heat convection 热对流 plays a crucial role in maintaining indoor temperatures by circulating warm air.

在建筑物中，热对流 热对流在通过循环温暖空气来维持室内温度方面发挥着至关重要的作用。

3.When cooking on a stovetop, heat convection 热对流 ensures that food cooks evenly by moving heat through the liquid.

在炉灶上烹饪时，热对流 热对流通过在液体中移动热量来确保食物均匀烹饪。

4.In a hot cup of coffee, the steam rising is a result of heat convection 热对流 as warmer air rises and cooler air descends.

在一杯热咖啡中，冒出的蒸汽是由于热对流 热对流的结果，温暖的空气上升，冷却的空气下降。

5.The heat convection 热对流 in a pot of boiling water helps to evenly distribute the temperature throughout the liquid.

在一锅沸水中的热对流 热对流有助于均匀分布液体中的温度。

作文

Heat transfer is a fundamental concept in physics and engineering, and one of the primary modes of heat transfer is through heat convection. Heat convection refers to the process by which heat is transferred from one material to another through the movement of fluids, such as liquids and gases. This phenomenon occurs when a fluid is heated, causing it to become less dense and rise, while cooler, denser fluid sinks, creating a circulation pattern. Understanding heat convection is essential for various applications, including heating systems, cooling systems, and even natural phenomena like ocean currents and atmospheric circulation.In practical terms, heat convection can be observed in everyday life. For example, when you boil water in a pot, the water at the bottom heats up first, becomes less dense, and rises to the surface. Meanwhile, the cooler water descends to take its place, resulting in a continuous circulation of water that eventually leads to the entire pot of water reaching a uniform temperature. This is a classic example of heat convection in action.There are two main types of heat convection: natural convection and forced convection. Natural convection occurs due to the buoyancy effects caused by temperature differences within the fluid. For instance, in a room heated by a radiator, the warm air rises and creates a flow of air that distributes heat throughout the space. On the other hand, forced convection involves an external force, such as a fan or pump, to facilitate the movement of the fluid. An example of forced convection can be seen in a car's radiator, where a fan helps to circulate air over the radiator to cool the engine.The efficiency of heat convection can be influenced by several factors, including the properties of the fluid, the temperature difference, and the surface area of the materials involved. Engineers often use this knowledge to design systems that optimize heat convection, ensuring effective heating or cooling. For instance, in building design, architects may incorporate features like large windows and open spaces to enhance natural heat convection, reducing the need for mechanical heating and cooling systems.Moreover, heat convection plays a critical role in environmental processes. In the atmosphere, heat convection contributes to weather patterns and climate dynamics. Warm air rising and cool air sinking creates wind patterns, which can lead to precipitation and other weather phenomena. Similarly, in oceans, heat convection drives currents that regulate temperatures and distribute nutrients, supporting marine ecosystems.In conclusion, understanding heat convection is crucial for both scientific and practical applications. Whether in designing efficient heating systems, understanding weather patterns, or studying ocean currents, heat convection is a key concept that illustrates the dynamic nature of heat transfer. By grasping how heat convection works, we can better appreciate the complexities of our environment and improve various technologies that rely on this fundamental principle.

热传递是物理学和工程学中的一个基本概念，而热传递的主要方式之一就是通过热对流。热对流指的是通过流体（如液体和气体）的运动将热量从一种材料转移到另一种材料的过程。当流体被加热时，它的密度降低并上升，而较冷、较密的流体则下沉，从而形成循环模式。理解热对流对于各种应用至关重要，包括供暖系统、冷却系统，甚至自然现象，如洋流和大气环流。在实际生活中，我们可以观察到热对流的例子。例如，当你在锅中煮水时，底部的水首先加热，变得不那么密集并上升到表面。与此同时，较冷的水则下降以取而代之，导致整个锅中的水最终达到均匀的温度。这是热对流作用的经典例子。热对流主要有两种类型：自然对流和强制对流。自然对流是由于流体内的温差引起的浮力效应而发生的。例如，在一个由散热器加热的房间中，温暖的空气上升并形成空气流动，将热量分布到整个空间。另一方面，强制对流涉及外部力量（如风扇或泵）来促进流体的运动。强制对流的一个例子可以在汽车的散热器中看到，风扇帮助空气流过散热器以冷却发动机。热对流的效率可以受到多个因素的影响，包括流体的性质、温差以及涉及材料的表面积。工程师通常利用这些知识来设计优化热对流的系统，以确保有效的加热或冷却。例如，在建筑设计中，建筑师可能会结合大型窗户和开放空间等特征，以增强自然热对流，减少机械加热和冷却系统的需求。此外，热对流在环境过程中也起着关键作用。在大气中，热对流对天气模式和气候动态产生影响。温暖的空气上升和冷空气下沉形成风模式，这可能导致降水和其他天气现象。同样，在海洋中，热对流驱动的洋流调节温度并分配养分，支持海洋生态系统。总之，理解热对流对于科学和实际应用都至关重要。无论是在设计高效的供暖系统、理解天气模式还是研究洋流，热对流都是一个关键概念，展示了热传递的动态特性。通过掌握热对流的工作原理，我们可以更好地欣赏我们环境的复杂性，并改善依赖于这一基本原理的各种技术。