laminar flow

简明释义

层流

英英释义

例句

1.The design of airplane wings takes into account laminar flow (层流) to reduce drag.

飞机翼的设计考虑了层流以减少阻力。

2.In medical devices, maintaining laminar flow (层流) is crucial for preventing contamination.

在医疗设备中，保持层流对于防止污染至关重要。

3.Scientists often study laminar flow (层流) to understand fluid dynamics in various applications.

科学家们常常研究层流以理解各种应用中的流体动力学。

4.In a straight pipe, the water moves in smooth layers, demonstrating laminar flow (层流).

在一根直管中，水以平滑的层次流动，展示了层流。

5.The laminar flow (层流) in this laboratory hood ensures a sterile environment.

这个实验室通风柜中的层流确保了无菌环境。

作文

In the study of fluid dynamics, one of the most fascinating concepts is laminar flow. This term refers to a type of fluid flow where the fluid moves in smooth, parallel layers, with minimal disruption between them. In contrast to turbulent flow, where the motion is chaotic and irregular, laminar flow is characterized by its orderly and predictable nature. Understanding laminar flow is crucial in various fields, including engineering, meteorology, and medicine, as it plays a significant role in the behavior of fluids in different environments.To illustrate the principles of laminar flow, consider the example of a slow-moving river. When the water flows gently over a flat surface, it tends to move in layers, with the top layer moving faster than the bottom. This is a classic demonstration of laminar flow. The layers of water glide smoothly past one another without mixing, allowing for a clear and stable flow pattern. In this scenario, the velocity gradient is consistent, which is a hallmark of laminar flow. In engineering applications, laminar flow is often desired in situations such as the design of aircraft wings or the development of efficient piping systems. For instance, when air flows over an aircraft wing, maintaining laminar flow can reduce drag and improve fuel efficiency. Engineers strive to create shapes that promote laminar flow around the wings, allowing for smoother airflow and enhanced performance.On the other hand, when the speed of the fluid increases or the surface becomes rough, laminar flow can transition into turbulent flow. This transition can lead to increased drag and energy loss, making it essential for engineers to carefully consider the conditions under which laminar flow can be maintained. The Reynolds number, a dimensionless quantity used to predict flow patterns in different fluid flow situations, is a critical factor in determining whether flow will be laminar or turbulent. A low Reynolds number typically indicates laminar flow, while a high Reynolds number suggests turbulence.In the medical field, understanding laminar flow is vital for ensuring safety in environments such as operating rooms. Hospitals often utilize laminar flow systems to maintain a sterile environment by directing clean air in a controlled manner. This helps to minimize the risk of infection by preventing airborne contaminants from settling on surgical sites. The application of laminar flow technologies in healthcare demonstrates how this concept extends beyond theoretical studies and has practical implications in real-world scenarios.In conclusion, laminar flow is a fundamental concept in fluid dynamics that describes the orderly movement of fluid in parallel layers. Its significance spans multiple disciplines, from engineering to medicine, highlighting the importance of understanding fluid behavior in various contexts. As we continue to explore the intricacies of fluid dynamics, the principles of laminar flow will undoubtedly remain a critical area of study, influencing innovations and practices across numerous fields.

在流体动力学的研究中，最引人入胜的概念之一是层流。这个术语指的是一种流体流动，其中流体以平滑、平行的层次移动，层间的干扰最小。与湍流相对，后者的运动是混乱和不规则的，层流的特点是其有序和可预测的特性。理解层流在工程、气象和医学等多个领域至关重要，因为它在不同环境中流体的行为中起着重要作用。为了说明层流的原理，可以考虑慢速移动的河流的例子。当水在平坦的表面上缓慢流动时，它往往会以层的形式移动，顶部的水层流动速度快于底部。这是层流的经典演示。水层平滑地滑过彼此，而不发生混合，从而允许清晰而稳定的流动模式。在这种情况下，速度梯度是一致的，这正是层流的标志。在工程应用中，层流通常是在设计飞机机翼或开发高效管道系统等情况下所期望的。例如，当空气在飞机机翼上流动时，保持层流可以减少阻力并提高燃油效率。工程师们努力创造促进机翼周围层流的形状，从而实现更平滑的气流和更好的性能。另一方面，当流体的速度增加或表面变得粗糙时，层流可能会过渡到湍流。这种过渡可能导致阻力和能量损失的增加，因此工程师必须仔细考虑保持层流的条件。雷诺数，一个用于预测不同流体流动情况中的流动模式的无量纲量，是确定流动是层流还是湍流的关键因素。低雷诺数通常表示层流，而高雷诺数则表明湍流。在医疗领域，理解层流对于确保手术室等环境的安全至关重要。医院通常利用层流系统来维持无菌环境，通过以受控方式引导清洁空气。这有助于最大限度地减少感染风险，防止空气传播的污染物沉积在手术部位。层流技术在医疗保健中的应用展示了这一概念超越理论研究，并在现实场景中具有实际意义。总之，层流是流体动力学中的一个基本概念，描述了流体在平行层次中有序移动的现象。它的重要性跨越多个学科，从工程到医学，突显了在各种背景下理解流体行为的重要性。随着我们继续探索流体动力学的复杂性，层流的原理无疑将继续成为研究的关键领域，影响各个领域的创新和实践。