surface boiling

简明释义

表面沸腾

英英释义

例句

1.When cooking pasta, you want to achieve a steady surface boiling (表面沸腾) to ensure even cooking.

在煮意大利面的过程中，你希望达到稳定的表面沸腾以确保均匀烹饪。

2.During the experiment, we observed that the liquid started to experience surface boiling (表面沸腾) at around 100 degrees Celsius.

在实验中，我们观察到液体在大约100摄氏度时开始经历表面沸腾。

3.The researchers noted that surface boiling (表面沸腾) can lead to increased heat flux in thermal systems.

研究人员指出，表面沸腾可以导致热系统中热通量的增加。

4.In industrial applications, controlling surface boiling (表面沸腾) is crucial for efficient heat transfer.

在工业应用中，控制表面沸腾对于高效的热传递至关重要。

5.The kettle began to whistle as it reached the surface boiling (表面沸腾) point.

水壶开始鸣叫，因为它达到了表面沸腾的临界点。

作文

In the study of thermodynamics and heat transfer, one important phenomenon that engineers and scientists must understand is surface boiling. This process occurs when a liquid is heated to its boiling point at a surface, causing the formation of vapor bubbles that rise to the surface and escape into the atmosphere. The concept of surface boiling is crucial in various applications, from industrial processes to household appliances. Understanding how this process works can lead to more efficient heating systems and improved safety measures in environments where high temperatures are involved.At the core of surface boiling is the interaction between heat transfer and fluid dynamics. When a liquid comes into contact with a hot surface, such as a metal plate or a heating element, heat is transferred from that surface to the liquid. As the temperature of the liquid increases, it eventually reaches a point where it begins to boil. This boiling process can be categorized into different regimes: nucleate boiling, transition boiling, and film boiling. Each of these regimes has distinct characteristics and implications for heat transfer efficiency.Nucleate boiling is the initial stage of surface boiling, where small vapor bubbles form at discrete sites on the heated surface. These bubbles grow as they absorb heat and eventually detach from the surface, rising to the liquid's surface. This stage is highly efficient for heat transfer because the movement of the bubbles enhances the mixing of the liquid, allowing for better heat distribution. Engineers often strive to maximize nucleate boiling conditions in cooling systems to improve performance.As the heat flux increases, the system may enter the transition boiling regime. In this phase, the behavior of the bubbles becomes less predictable, and the overall heat transfer efficiency can decrease. Transition boiling can lead to unstable conditions, which can be detrimental in industrial applications. Understanding the parameters that govern the shift from nucleate to transition boiling is essential for maintaining optimal operating conditions.The final stage of surface boiling is film boiling, which occurs when the heat flux is extremely high. In this regime, a continuous layer of vapor forms between the heated surface and the liquid, acting as an insulating barrier. This significantly reduces the heat transfer rate and can lead to overheating of the surface, potentially causing damage. Hence, controlling the transition between these boiling regimes is critical in engineering applications to prevent equipment failure and ensure safety.In practical terms, surface boiling can be observed in everyday situations, such as when water is boiled in a pot. As the heat source increases, the water begins to bubble vigorously, demonstrating the principles of nucleate boiling. Understanding this process not only helps in designing better cooking appliances but also in developing industrial systems that rely on precise temperature control.In conclusion, surface boiling is a fundamental concept in heat transfer that has significant implications across various fields. From ensuring the efficiency of heating systems to preventing overheating in industrial applications, mastering the intricacies of this process is vital for engineers and scientists alike. By studying the different regimes of surface boiling and their effects on heat transfer, we can design safer and more efficient systems that harness the power of heat effectively. The exploration of this phenomenon continues to be a rich area of research, promising advancements in technology and improvements in our daily lives.

在热力学和热传递的研究中，工程师和科学家必须理解的重要现象之一是表面沸腾。这一过程发生在液体在某个表面被加热到其沸点时，导致蒸汽气泡的形成，这些气泡会上升到表面并释放到大气中。表面沸腾的概念在各种应用中至关重要，从工业过程到家庭电器。理解这一过程的工作原理可以导致更高效的加热系统和在高温环境中改进的安全措施。在表面沸腾的核心是热传递与流体动力学之间的相互作用。当液体接触到热表面时，例如金属板或加热元件，热量从该表面传递到液体。随着液体温度的升高，它最终达到一个开始沸腾的点。这个沸腾过程可以分为不同的阶段：成核沸腾、过渡沸腾和膜沸腾。每个阶段都有不同的特征和对热传递效率的影响。成核沸腾是表面沸腾的初始阶段，在这个阶段，小蒸汽气泡在加热表面的离散点形成。这些气泡随着吸收热量而增长，最终从表面脱落，向液体表面上升。这个阶段对于热传递非常有效，因为气泡的运动增强了液体的混合，使热量分布更均匀。工程师通常努力在冷却系统中最大化成核沸腾条件，以提高性能。随着热通量的增加，系统可能进入过渡沸腾阶段。在这个阶段，气泡的行为变得不那么可预测，整体热传递效率可能下降。过渡沸腾可能导致不稳定的条件，这在工业应用中是有害的。理解控制从成核沸腾到过渡沸腾转变的参数对于保持最佳操作条件至关重要。表面沸腾的最后阶段是膜沸腾，当热通量极高时发生。在这个阶段，加热表面与液体之间形成一层连续的蒸汽，充当绝缘屏障。这显著降低了热传递速率，并可能导致表面过热，潜在地造成损坏。因此，控制这些沸腾阶段之间的转变对于工程应用至关重要，以防止设备故障并确保安全。在实际情况下，表面沸腾可以在日常情境中观察到，例如当水在锅中煮沸时。随着热源的增加，水开始猛烈冒泡，展示了成核沸腾的原理。理解这一过程不仅有助于设计更好的烹饪电器，还有助于开发依赖精确温控的工业系统。总之，表面沸腾是热传递中的一个基本概念，对各个领域有重要影响。从确保加热系统的效率到防止工业应用中的过热，掌握这一过程的复杂性对工程师和科学家来说都是至关重要的。通过研究表面沸腾的不同阶段及其对热传递的影响，我们可以设计出更安全、更高效的系统，有效利用热能。对这一现象的探索仍然是一个丰富的研究领域，承诺在技术和改善我们日常生活方面取得进展。