laminar-turbulent transition

简明释义

层流湍流转变

英英释义

例句

1.Engineers must consider the laminar-turbulent transition 层流-湍流转变 when designing efficient cooling systems.

工程师在设计高效冷却系统时必须考虑层流-湍流转变。

2.The research team used computational fluid dynamics to simulate the laminar-turbulent transition 层流-湍流转变 in various flow conditions.

研究小组使用计算流体动力学模拟了不同流动条件下的层流-湍流转变。

3.Understanding the laminar-turbulent transition 层流-湍流转变 is crucial for optimizing aircraft wing designs.

理解层流-湍流转变对优化飞机机翼设计至关重要。

4.The study focused on the effects of surface roughness on the laminar-turbulent transition 层流-湍流转变 in pipe flow.

这项研究集中于表面粗糙度对管道流动中层流-湍流转变的影响。

5.In wind tunnel tests, scientists observed the laminar-turbulent transition 层流-湍流转变 at different speeds.

在风洞测试中，科学家观察到了不同速度下的层流-湍流转变。

作文

The study of fluid dynamics encompasses a variety of phenomena, one of the most intriguing being the laminar-turbulent transition. This transition describes the change in flow regime from smooth and orderly (laminar) to chaotic and irregular (turbulent). Understanding this transition is crucial for engineers and scientists alike, as it has significant implications in various fields, including aerospace, civil engineering, and environmental science. In laminar flow, fluid particles move in parallel layers with minimal disruption between them. This type of flow is characterized by low velocity and high viscosity, allowing for predictable behavior. For instance, when water flows gently through a pipe, it exhibits laminar-turbulent transition characteristics, where the layers slide past one another without mixing. This phenomenon is essential in applications such as blood flow in arteries, where maintaining a laminar state can reduce the risk of clots and other complications.However, as velocity increases or as obstacles are introduced into the flow path, the system may reach a critical point where the flow becomes unstable. This is where the laminar-turbulent transition occurs. The orderly layers begin to break down, leading to eddies and vortices that characterize turbulent flow. This shift can be observed in various scenarios, such as when water flows over a dam or when air travels over an aircraft wing. The implications of this transition are profound. In engineering, understanding the laminar-turbulent transition helps in designing more efficient vehicles and structures. For example, in aerodynamics, engineers strive to maintain laminar flow over wings to reduce drag and improve fuel efficiency. Conversely, in some cases, inducing turbulence can enhance mixing and promote better heat transfer, which is beneficial in industrial processes. Research into the laminar-turbulent transition has led to the development of various mathematical models and computational simulations that help predict when and how this transition will occur. These tools are invaluable for optimizing designs and ensuring safety in engineering applications. Furthermore, studying this transition also provides insights into natural phenomena, such as weather patterns and ocean currents, which are influenced by the balance between laminar and turbulent flow. In conclusion, the laminar-turbulent transition is a fundamental concept in fluid dynamics that bridges the gap between predictable and chaotic flow. By understanding this transition, we can make informed decisions in engineering practices and deepen our comprehension of the natural world. As technology advances, the ability to manipulate and harness these flow regimes will undoubtedly lead to innovations that enhance efficiency and sustainability across numerous industries.

流体动力学的研究涵盖了各种现象，其中一个最引人入胜的就是层流-湍流过渡。这个过渡描述了流动状态从平滑有序（层流）到混乱无序（湍流）的变化。理解这一过渡对工程师和科学家来说至关重要，因为它在航空航天、土木工程和环境科学等多个领域具有重要意义。在层流中，流体颗粒以平行层的方式移动，彼此之间干扰最小。这种类型的流动特征是低速和高粘度，使其行为可预测。例如，当水缓慢流经管道时，它表现出层流-湍流过渡的特征，层与层之间滑动而不混合。这种现象在应用中非常重要，例如血液在动脉中的流动，保持层流状态可以降低血栓和其他并发症的风险。然而，随着速度的增加或障碍物的引入，系统可能达到一个临界点，在这个点上流动变得不稳定。这就是层流-湍流过渡发生的地方。有序的层开始破裂，导致涡旋和涡流的形成，这些特征标志着湍流的流动。这一变化可以在各种场景中观察到，例如当水流过水坝或空气流过飞机机翼时。这一过渡的影响深远。在工程学中，理解层流-湍流过渡有助于设计更高效的交通工具和结构。例如，在空气动力学中，工程师努力保持机翼上的层流，以减少阻力并提高燃油效率。相反，在某些情况下，诱导湍流可以增强混合并促进更好的热传递，这在工业过程中是有利的。对层流-湍流过渡的研究促使开发了各种数学模型和计算模拟，帮助预测这一过渡何时以及如何发生。这些工具对于优化设计和确保工程应用的安全性是无价的。此外，研究这一过渡还提供了对自然现象的深入了解，例如天气模式和海洋洋流，它们受到层流和湍流流动之间平衡的影响。总之，层流-湍流过渡是流体动力学中的一个基本概念，架起了可预测流动与混沌流动之间的桥梁。通过理解这一过渡，我们可以在工程实践中做出明智的决策，并加深对自然世界的理解。随着技术的进步，操控和利用这些流动状态的能力无疑将导致创新，从而提高各个行业的效率和可持续性。