nusselt number

简明释义

努塞尔特数

英英释义

例句

1.In fluid dynamics, the Nusselt number 努塞尔数 is used to characterize convective heat transfer.

在流体动力学中，Nusselt number 努塞尔数 用于表征对流热传递。

2.A higher Nusselt number 努塞尔数 indicates more efficient heat transfer in a fluid.

较高的Nusselt number 努塞尔数 表明流体中的热传递更有效。

3.The Nusselt number 努塞尔数 can be influenced by the flow regime of the fluid.

流体的流动状态会影响Nusselt number 努塞尔数。

4.In forced convection scenarios, the Nusselt number 努塞尔数 is typically higher than in natural convection.

在强制对流情况下，Nusselt number 努塞尔数 通常高于自然对流。

5.Engineers often calculate the Nusselt number 努塞尔数 when designing heat exchangers.

工程师在设计热交换器时常常计算Nusselt number 努塞尔数。

作文

The concept of Nusselt number is fundamental in the field of heat transfer, providing a dimensionless measure of the convective heat transfer relative to conductive heat transfer. Named after the German engineer Wilhelm Nusselt, this number is crucial for engineers and scientists as it helps in understanding how heat moves through fluids. The Nusselt number is defined as the ratio of convective to conductive heat transfer across a boundary, making it an essential parameter in thermal analysis.In practical applications, the Nusselt number allows for the evaluation of heat exchangers, cooling systems, and other thermal devices. For instance, when designing a heat exchanger, engineers must consider the Nusselt number to ensure efficient thermal performance. A high Nusselt number indicates that convection is dominant over conduction, which is desirable in many applications where rapid heat transfer is necessary.The Nusselt number can vary depending on several factors, including fluid properties, flow conditions, and the geometry of the system. It is often calculated using empirical correlations derived from experimental data. In laminar flow, for example, the Nusselt number can be determined using simple equations, whereas turbulent flow requires more complex calculations due to the chaotic nature of the fluid motion.Understanding the Nusselt number is not only important for theoretical studies but also for real-world engineering problems. For example, in the food industry, maintaining the right temperature during processing is critical to ensure food safety and quality. Engineers use the Nusselt number to design equipment that efficiently transfers heat to or from food products, ensuring that they are cooked or cooled uniformly.Moreover, the Nusselt number plays a significant role in environmental engineering, particularly in the study of natural convection in buildings. By analyzing the Nusselt number, engineers can optimize heating and cooling systems to improve energy efficiency and reduce costs. This is increasingly important in the context of sustainable building designs, where minimizing energy consumption is a priority.In summary, the Nusselt number is a critical parameter in the study of heat transfer, influencing various engineering applications from heat exchangers to food processing and building design. Its ability to quantify the effectiveness of convective heat transfer makes it an invaluable tool for engineers and scientists alike. As we continue to advance in technology and strive for greater energy efficiency, understanding and applying the principles behind the Nusselt number will remain essential in the pursuit of innovation and sustainability in thermal management.

Nusselt number的概念在热传递领域是基础性的，提供了对流热传递与导热传递相对的无量纲测量。它以德国工程师威廉·努塞尔的名字命名，对于工程师和科学家来说，这个数字对于理解热量如何通过流体移动至关重要。Nusselt number被定义为通过边界的对流与导热传递的比率，使其成为热分析中的关键参数。在实际应用中，Nusselt number可以用于评估热交换器、冷却系统和其他热设备。例如，在设计热交换器时，工程师必须考虑Nusselt number以确保热性能的高效。高Nusselt number表明对流主导于导热，这在许多需要快速热传递的应用中是可取的。Nusselt number可能因几个因素而异，包括流体特性、流动条件和系统几何形状。它通常使用从实验数据得出的经验相关关系进行计算。例如，在层流中，Nusselt number可以通过简单的方程来确定，而湍流则由于流体运动的混乱性质需要更复杂的计算。理解Nusselt number不仅对理论研究重要，而且对现实世界的工程问题也至关重要。例如，在食品工业中，处理过程中的温度控制对于确保食品安全和质量至关重要。工程师利用Nusselt number设计有效地将热量传递到或从食品产品中，确保它们均匀地被烹饪或冷却。此外，Nusselt number在环境工程中也发挥着重要作用，特别是在建筑物自然对流研究中。通过分析Nusselt number，工程师可以优化供暖和制冷系统，以提高能效并降低成本。在可持续建筑设计的背景下，这一点变得尤为重要，因为减少能源消耗是优先事项。总之，Nusselt number是热传递研究中的关键参数，影响从热交换器到食品加工和建筑设计等各种工程应用。它量化对流热传递有效性的能力使其成为工程师和科学家不可或缺的工具。随着技术的不断进步和追求更高的能效，理解和应用Nusselt number背后的原理将在热管理的创新和可持续发展追求中继续发挥重要作用。