convective heat transfer

简明释义

对流传热

英英释义

例句

1.The efficiency of the radiator is largely determined by convective heat transfer between the hot water and the air in the room.

散热器的效率在很大程度上取决于热水与房间空气之间的对流热传递。

2.In cooking, convective heat transfer occurs when hot air circulates around food in an oven.

在烹饪中，当热空气在烤箱中循环时，会发生对流热传递。

3.In a heated swimming pool, the warm water rises due to convective heat transfer, which is the process of heat moving through fluids.

在一个加热的游泳池中，温暖的水因对流热传递而上升，这是一种热量通过流体移动的过程。

4.The design of the HVAC system takes into account convective heat transfer to ensure even heating throughout the building.

HVAC系统的设计考虑到对流热传递，以确保建筑物内均匀加热。

5.When you boil water, convective heat transfer helps distribute the heat from the stove throughout the pot.

当你煮水时，对流热传递有助于将炉子上的热量分布到锅中。

作文

Understanding the mechanisms of heat transfer is essential in various fields of science and engineering. One of the most significant modes of heat transfer is known as convective heat transfer. This process involves the transfer of heat between a solid surface and a fluid (liquid or gas) that is in motion. The importance of convective heat transfer can be observed in everyday life, from the heating of a room to the cooling of electronic devices.In essence, convective heat transfer occurs when a fluid flows over a surface, absorbing heat from it. This heat transfer can be categorized into two types: forced convection and natural convection. Forced convection happens when an external force, such as a pump or fan, moves the fluid. For example, in a car radiator, a fan blows air over the hot coolant, enhancing the heat dissipation process. On the other hand, natural convection occurs due to buoyancy forces that arise from temperature differences within the fluid. A classic example of natural convection is the way warm air rises and cool air sinks in a room, creating a circulation pattern that helps distribute heat.The efficiency of convective heat transfer is influenced by several factors, including the properties of the fluid, the velocity of the fluid flow, and the surface area of the solid. For instance, fluids with higher thermal conductivity can transfer heat more effectively. Additionally, increasing the velocity of the fluid flow enhances the rate of heat transfer, as it reduces the thickness of the thermal boundary layer that forms near the surface.In engineering applications, understanding convective heat transfer is crucial for designing efficient heating and cooling systems. For example, in HVAC (heating, ventilation, and air conditioning) systems, engineers must ensure adequate airflow to maintain comfortable indoor temperatures. Similarly, in the design of heat exchangers, which are used to transfer heat between two or more fluids, optimizing convective heat transfer is key to improving energy efficiency.Moreover, convective heat transfer plays a vital role in environmental phenomena. For instance, ocean currents, which are driven by wind and temperature differences, are a form of convective heat transfer that affects global climate patterns. Understanding these processes helps scientists predict weather changes and assess the impacts of climate change.In conclusion, convective heat transfer is a fundamental concept that has wide-ranging implications in both practical applications and natural processes. By grasping the principles behind this mode of heat transfer, we can improve the efficiency of various systems, enhance our understanding of environmental dynamics, and ultimately contribute to advancements in technology and sustainability. As we continue to explore the intricacies of heat transfer, the significance of convective heat transfer will undoubtedly remain a focal point in scientific research and engineering innovation.

理解热传递机制在科学和工程的各个领域都是至关重要的。最重要的热传递方式之一被称为对流热传递。这个过程涉及到固体表面与运动中的流体（液体或气体）之间的热量转移。对流热传递的重要性可以在日常生活中观察到，从房间的加热到电子设备的冷却。本质上，对流热传递发生在流体流过表面时，从中吸收热量。这种热量转移可以分为两种类型：强制对流和自然对流。强制对流发生在外部力量（如泵或风扇）推动流体时。例如，在汽车散热器中，风扇将空气吹过热冷却液，从而增强热量的散发过程。另一方面，自然对流是由于流体内温度差异产生的浮力作用而发生的。自然对流的经典例子是温暖的空气上升，冷空气下沉，形成循环模式，帮助分配热量。对流热传递的效率受到几个因素的影响，包括流体的性质、流体流动的速度和固体的表面积。例如，具有较高热导率的流体可以更有效地传递热量。此外，增加流体流动的速度增强了热量转移的速率，因为它减少了靠近表面形成的热边界层的厚度。在工程应用中，理解对流热传递对于设计高效的加热和冷却系统至关重要。例如，在HVAC（供暖、通风和空调）系统中，工程师必须确保足够的气流以维持舒适的室内温度。同样，在热交换器的设计中，热交换器用于在两个或多个流体之间转移热量，优化对流热传递是提高能源效率的关键。此外，对流热传递在环境现象中也发挥着重要作用。例如，由风和温度差驱动的洋流是一种对流热传递，影响全球气候模式。理解这些过程有助于科学家预测天气变化并评估气候变化的影响。总之，对流热传递是一个基本概念，对实际应用和自然过程都有广泛的影响。通过掌握这种热传递方式背后的原理，我们可以提高各种系统的效率，增强对环境动态的理解，并最终促进技术和可持续发展的进步。随着我们继续探索热传递的复杂性，对流热传递的重要性无疑将继续成为科学研究和工程创新的焦点。