laminar flow

简明释义

层流

英英释义

例句

1.The laminar flow 层流 of blood in arteries is essential for healthy circulation.

动脉中的层流 laminar flow 对于健康的循环至关重要。

2.Laboratories use laminar flow 层流 hoods to create a sterile environment for experiments.

实验室使用层流 laminar flow 吊柜来创造无菌环境以进行实验。

3.In aerodynamics, understanding laminar flow 层流 is crucial for designing efficient aircraft wings.

在空气动力学中，理解层流 laminar flow 对于设计高效的飞机机翼至关重要。

4.Engineers often utilize laminar flow 层流 to minimize drag on vehicles.

工程师们常常利用层流 laminar flow 来最小化车辆的阻力。

5.In fluid mechanics, laminar flow 层流 occurs when the fluid flows in parallel layers.

在流体力学中，层流 laminar flow 发生在流体以平行层流动时。

作文

In fluid dynamics, the concept of laminar flow refers to a smooth and orderly movement of fluid in which layers of fluid slide past one another with minimal mixing. This phenomenon occurs at lower velocities and is characterized by parallel streamlines. Understanding laminar flow is crucial in various fields, including engineering, meteorology, and medicine, as it has significant implications for the design of systems and the prediction of fluid behavior.When studying laminar flow, it is essential to recognize the conditions under which it occurs. Typically, laminar flow is observed in fluids moving slowly through a pipe or over a surface. The Reynolds number, a dimensionless quantity, is used to predict the flow regime of a fluid. When the Reynolds number is below approximately 2000, the flow tends to be laminar. As the velocity increases, the flow can transition to turbulent flow, where chaotic eddies and vortices form, leading to increased mixing and resistance.The applications of laminar flow are vast. In the medical field, for instance, laminar flow hoods are utilized in laboratories to provide a sterile environment for handling sensitive materials. These hoods operate by drawing air through filters, ensuring that the air that flows over the work surface is clean and free from contaminants. This is vital in preventing infections during surgical procedures or in the preparation of pharmaceuticals.In engineering, the design of vehicles, aircraft, and even buildings often takes into account the principles of laminar flow. For example, aerodynamic shapes are crafted to minimize drag by promoting laminar flow over surfaces instead of turbulent flow. This not only enhances fuel efficiency but also improves performance. Engineers utilize computational fluid dynamics (CFD) simulations to analyze and optimize designs based on laminar flow characteristics, ensuring that products are both effective and efficient.Moreover, understanding laminar flow is important in environmental science. For instance, the flow of water in rivers and streams can significantly affect sediment transport and ecosystem health. When water flows in a laminar manner, sediments settle more predictably, which can benefit aquatic habitats. Conversely, turbulent flow can lead to erosion and habitat destruction, highlighting the need for effective management practices in natural water bodies.In conclusion, the study of laminar flow is an essential aspect of fluid dynamics with far-reaching implications across various disciplines. Its understanding aids in the design of sterile environments in healthcare, enhances the performance of vehicles, and informs environmental conservation efforts. As we continue to explore the intricacies of fluid behavior, the principles of laminar flow will remain fundamental in advancing technology and protecting our ecosystems.

在流体动力学中，层流的概念指的是流体的平滑有序运动，其中流体的层次彼此滑动，混合最小。这种现象发生在较低的速度下，其特征是平行的流线。理解层流在各个领域中至关重要，包括工程、气象和医学，因为它对系统设计和流体行为的预测具有重要意义。在研究层流时，必须认识到它发生的条件。通常，层流出现在流体缓慢通过管道或表面时。雷诺数，一个无量纲量，被用来预测流体的流动状态。当雷诺数低于大约2000时，流动往往是层流。随着速度的增加，流动可能会转变为湍流，在这种情况下，形成混乱的涡流和漩涡，导致混合和阻力的增加。层流的应用非常广泛。例如，在医疗领域，层流罩被用于实验室中，为处理敏感材料提供无菌环境。这些罩通过过滤器抽吸空气，确保流过工作表面的空气干净且无污染。这在手术过程中预防感染或制药准备中至关重要。在工程学中，车辆、飞机甚至建筑物的设计通常考虑到层流的原理。例如，空气动力学形状被设计成通过促进层流而减少阻力。这样不仅提高了燃油效率，还改善了性能。工程师利用计算流体动力学（CFD）模拟来分析和优化基于层流特性的设计，确保产品既有效又高效。此外，理解层流在环境科学中也很重要。例如，河流和溪流中的水流可以显著影响沉积物运输和生态系统健康。当水以层流方式流动时，沉积物更可预测地沉降，这可能有利于水生栖息地。相反，湍流可能导致侵蚀和栖息地破坏，强调了在自然水体中有效管理实践的必要性。总之，层流的研究是流体动力学的一个基本方面，对各个学科具有深远的影响。它的理解有助于医疗中的无菌环境设计，提高车辆性能，并为环境保护工作提供信息。随着我们继续探索流体行为的复杂性，层流的原理将在推动技术进步和保护生态系统方面保持基础性作用。