nusselt number

简明释义

努塞尔特数

英英释义

例句

1.The Nusselt number 努塞尔特数 is crucial for predicting thermal performance in various applications.

Nusselt number 努塞尔特数对于预测各种应用中的热性能至关重要。

2.To optimize cooling systems, we must analyze the Nusselt number 努塞尔特数 under different flow conditions.

为了优化冷却系统，我们必须分析不同流动条件下的Nusselt number 努塞尔特数。

3.In forced convection, a higher Nusselt number 努塞尔特数 indicates better heat transfer.

在强迫对流中，较高的Nusselt number 努塞尔特数表示更好的热传递。

4.The heat transfer efficiency of the system can be evaluated by calculating the Nusselt number 努塞尔特数.

通过计算Nusselt number 努塞尔特数，可以评估系统的热传递效率。

5.Engineers often use the Nusselt number 努塞尔特数 to design heat exchangers.

工程师通常使用Nusselt number 努塞尔特数来设计换热器。

作文

The Nusselt number is a dimensionless quantity used in heat transfer calculations, which characterizes the ratio of convective to conductive heat transfer across a boundary. Understanding the Nusselt number is essential for engineers and scientists working in thermal management, as it helps predict how efficiently heat will be transferred in various systems. In essence, the Nusselt number provides insight into the effectiveness of convection in transferring heat compared to conduction, which is crucial for designing efficient heating and cooling systems.To delve deeper into the significance of the Nusselt number, we can consider its application in different scenarios. For example, in the case of fluid flow over a heated surface, the Nusselt number can help determine how well the fluid absorbs heat from that surface. A higher Nusselt number indicates that convection is more effective than conduction, meaning that the fluid is capable of carrying away heat more efficiently. Conversely, a low Nusselt number suggests that heat transfer is primarily through conduction, which may not be sufficient for certain applications where rapid cooling or heating is required.The calculation of the Nusselt number can vary depending on the geometry of the system and the flow conditions. For instance, in laminar flow over a flat plate, the Nusselt number can be expressed as a function of the Reynolds number and the Prandtl number, both of which are dimensionless numbers that characterize the flow regime and the thermal properties of the fluid, respectively. In turbulent flow, the relationship becomes more complex, often requiring empirical correlations to accurately estimate the Nusselt number.In practical applications, the Nusselt number plays a pivotal role in the design of heat exchangers, which are critical components in various industrial processes. Engineers utilize the Nusselt number to optimize the performance of these devices by ensuring that they operate under conditions that maximize heat transfer efficiency. This can lead to significant energy savings and improved overall system performance.Moreover, the Nusselt number is not only relevant in mechanical engineering but also finds applications in fields such as meteorology, where it can help model heat transfer processes in the atmosphere. By understanding the Nusselt number, meteorologists can better predict temperature distributions and weather patterns, contributing to more accurate forecasting.In conclusion, the Nusselt number is a fundamental concept in heat transfer that facilitates a deeper understanding of the mechanisms involved in convective heat transfer. Its implications extend across various disciplines, making it a vital parameter in both theoretical studies and practical applications. As technology advances and the demand for efficient thermal management systems increases, the importance of the Nusselt number will continue to grow, highlighting the need for ongoing research and development in this area of study.

Nusselt数是一个无量纲的量，用于热传递计算，表征了边界上对流与导热之间的比率。理解Nusselt number对于从事热管理的工程师和科学家至关重要，因为它有助于预测各种系统中热量的传递效率。从本质上讲，Nusselt number提供了对流在传递热量方面的有效性相对于导热的见解，这对于设计高效的加热和冷却系统至关重要。为了更深入地探讨Nusselt number的重要性，我们可以考虑其在不同场景中的应用。例如，在流体流过加热表面的情况下，Nusselt number可以帮助确定流体从该表面吸收热量的能力。更高的Nusselt number表示对流比导热更有效，这意味着流体能够更高效地带走热量。相反，低Nusselt number则表明热传递主要通过导热进行，这可能不足以满足某些需要快速冷却或加热的应用。Nusselt number的计算可以根据系统的几何形状和流动条件而有所不同。例如，在平板上的层流中，Nusselt number可以表示为雷诺数和普朗特数的函数，这两者都是无量纲数，分别表征流动状态和流体的热特性。在湍流中，这种关系变得更加复杂，通常需要经验相关来准确估计Nusselt number。在实际应用中，Nusselt number在热交换器的设计中发挥着关键作用，热交换器是各种工业过程中的关键组件。工程师利用Nusselt number优化这些设备的性能，以确保它们在最大化热传递效率的条件下运行。这可以带来显著的节能效果和整体系统性能的提升。此外，Nusselt number不仅与机械工程相关，还在气象学等领域找到应用，有助于模拟大气中的热传递过程。通过理解Nusselt number，气象学家可以更好地预测温度分布和天气模式，从而提高预报的准确性。总之，Nusselt number是热传递中的基本概念，有助于更深入地理解对流热传递中涉及的机制。其影响跨越多个学科，使其成为理论研究和实际应用中的重要参数。随着技术的进步和对高效热管理系统需求的增加，Nusselt number的重要性将继续增长，突显了在这一领域持续研究和发展的必要性。