nucleate boiling

简明释义

泡核沸腾

英英释义

例句

1.The heat exchanger operates efficiently due to the presence of nucleate boiling (成核沸腾) on the surface.

由于表面存在nucleate boiling（成核沸腾），热交换器运行效率高。

2.Understanding nucleate boiling (成核沸腾) is crucial for designing efficient cooling systems.

理解nucleate boiling（成核沸腾）对设计高效冷却系统至关重要。

3.The onset of nucleate boiling (成核沸腾) can be influenced by surface roughness.

表面粗糙度会影响nucleate boiling（成核沸腾）的发生。

4.The researchers focused on the dynamics of nucleate boiling (成核沸腾) in their latest study.

研究人员在他们最新的研究中专注于nucleate boiling（成核沸腾）的动态。

5.In our experiments, we observed that nucleate boiling (成核沸腾) significantly enhances heat transfer rates.

在我们的实验中，我们观察到nucleate boiling（成核沸腾）显著提高了热传递速率。

作文

Nucleate boiling is a fundamental phenomenon in heat transfer, particularly in the context of boiling liquids. It occurs when a liquid is heated to its boiling point, leading to the formation of vapor bubbles at discrete sites on a heated surface. These bubbles grow and detach from the surface, rising to the liquid's surface where they release their vapor into the atmosphere. Understanding nucleate boiling (成核沸腾) is crucial for various applications, including power generation, chemical processing, and refrigeration systems.The process begins when the temperature of the liquid reaches a critical threshold, known as the saturation temperature. At this point, the liquid molecules gain enough energy to overcome intermolecular forces, resulting in bubble formation. The nucleation sites can be imperfections on the surface of a heating element, such as tiny scratches or rough areas, where vapor can form more easily. This process is influenced by several factors, including surface properties, temperature gradients, and the presence of impurities in the liquid.One of the key characteristics of nucleate boiling (成核沸腾) is its ability to enhance heat transfer efficiency. As bubbles form and collapse, they create a turbulent flow of liquid, which increases mixing and improves thermal conductivity. This phenomenon is particularly important in industrial settings, where efficient heat removal is necessary to prevent overheating and ensure optimal performance of equipment.In practical applications, engineers often design systems that promote nucleate boiling (成核沸腾) to maximize heat transfer rates. For instance, in nuclear reactors, the cooling systems rely on effective boiling to dissipate heat generated during fission reactions. Similarly, in heat exchangers, maximizing nucleate boiling (成核沸腾) can lead to improved efficiency and reduced energy consumption.However, there are challenges associated with managing nucleate boiling (成核沸腾). If the heat input exceeds the critical limit, the system may transition to a different boiling regime known as film boiling, where a stable vapor layer forms over the heating surface. This can significantly reduce heat transfer efficiency and lead to overheating, potentially damaging the equipment. Therefore, understanding the conditions that favor nucleate boiling (成核沸腾) is essential for safe and efficient operation.In conclusion, nucleate boiling (成核沸腾) is a critical process in various thermal systems, playing a vital role in enhancing heat transfer and ensuring operational safety. By studying the mechanisms behind this phenomenon, engineers can design better systems that leverage the benefits of boiling while mitigating the risks associated with excessive heat. As technology advances, the understanding of nucleate boiling (成核沸腾) will continue to evolve, paving the way for more efficient and sustainable thermal management solutions.

成核沸腾是热传递中的一种基本现象，尤其是在沸腾液体的背景下。当液体被加热到其沸点时，就会发生这种现象，导致在加热表面上形成气泡。这些气泡生长并从表面脱离，向液体表面上升，在那里将其蒸气释放到大气中。理解nucleate boiling（成核沸腾）对于各种应用至关重要，包括发电、化工处理和制冷系统。该过程始于液体温度达到临界阈值，即饱和温度。在这一点上，液体分子获得足够的能量以克服分子间的作用力，从而导致气泡的形成。成核位点可以是加热元件表面上的缺陷，例如微小的划痕或粗糙区域，在这些地方，蒸气更容易形成。这个过程受到多个因素的影响，包括表面特性、温度梯度和液体中杂质的存在。nucleate boiling（成核沸腾）的一个关键特征是它能够增强热传递效率。当气泡形成和崩溃时，它们会产生液体的湍流流动，从而增加混合并改善热导率。这种现象在工业环境中特别重要，因为高效的热去除对于防止过热和确保设备的最佳性能是必要的。在实际应用中，工程师通常设计促进nucleate boiling（成核沸腾）的系统，以最大化热传递速率。例如，在核反应堆中，冷却系统依赖有效的沸腾来散发在裂变反应中产生的热量。同样，在热交换器中，最大化nucleate boiling（成核沸腾）可以提高效率并减少能耗。然而，管理nucleate boiling（成核沸腾）也面临挑战。如果热输入超过临界限制，系统可能会转变为另一种沸腾状态，称为膜沸腾，此时在加热表面上形成稳定的蒸气层。这可能显著降低热传递效率并导致过热，可能损坏设备。因此，理解有利于nucleate boiling（成核沸腾）的条件对于安全高效的操作至关重要。总之，nucleate boiling（成核沸腾）是各种热系统中的关键过程，在增强热传递和确保操作安全方面发挥着重要作用。通过研究这一现象背后的机制，工程师可以设计更好的系统，利用沸腾的好处，同时减轻与过热相关的风险。随着技术的进步，对nucleate boiling（成核沸腾）的理解将继续发展，为更高效和可持续的热管理解决方案铺平道路。