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相关概念视频

Multiple Pipe Systems01:21

Multiple Pipe Systems

1.2K
Multipipe systems consist of complex configurations of interconnected pipes designed to transport fluids efficiently across intricate networks. They are essential in engineering applications requiring precise control over flow distribution, pressure, and head loss. They are categorized into series, parallel, loop, and network configurations, each distinguished by unique flow characteristics and applications.
Series Configuration
In a series configuration, fluid flows sequentially from one pipe...
1.2K
Single Pipe Systems01:24

Single Pipe Systems

428
In pipe flow analysis, problems are typically categorized into three types — Type I, Type II, and Type III — based on the known parameters and the desired outcome. Each type of problem addresses specific engineering requirements using fluid properties, pipe characteristics, and operational conditions.
In a Type I problem, fluid properties (density and viscosity), pipe characteristics (including diameter, length, and surface roughness), and the flow rate or average velocity are...
428
General Characteristics of Pipe Flow II01:24

General Characteristics of Pipe Flow II

1.6K
When fluid enters a pipe, it first passes through the entrance region, where the velocity profile adjusts due to viscous effects. In this region, a boundary layer forms along the pipe walls and grows until it fully occupies the pipe's cross-section. Once the boundary layer merges, the flow becomes fully developed, with a steady velocity profile that remains consistent along the pipe's length.
The distance to reach a fully developed flow is called the entrance length and depends on the...
1.6K
Design Example: Flow of Oil Through Circular Pipes01:25

Design Example: Flow of Oil Through Circular Pipes

440
Understanding fluid flow behavior through pipes is critical in fluid mechanics, especially in applications like oil transportation through pipelines. Hagen-Poiseuille's law provides an exact solution derived from the Navier-Stokes equations for steady, incompressible, and laminar flow within a circular pipe. Hagen-Poiseuille's law helps determine the necessary pressure drop across a pipeline section by determining parameters like pipe length, radius, oil viscosity, and the desired volumetric...
440
Laminar Flow01:27

Laminar Flow

2.1K
Laminar flow represents a smooth, orderly fluid motion where particles move along parallel paths, resulting in minimal mixing between layers. Streamlined particle paths characterize this flow regime and occur under conditions where viscous forces dominate over inertial forces. The distinction between laminar, transitional, and turbulent flow is primarily determined by the Reynolds number, a dimensionless quantity calculated as:
2.1K
General Characteristics of Pipe Flow I01:22

General Characteristics of Pipe Flow I

1.7K
Pipe flow refers to the movement of fluids within fully enclosed conduits, typically cylindrical in shape, such as water pipes or hydraulic hoses. These conduits are designed to withstand high-pressure gradients that drive fluid movement, contrasting with open-channel flows, where gravity is the primary driving force. Rectangular conduits, like air conditioning and heating ducts, generally operate at lower pressures and are less suited for high-pressure applications.
The classification of fluid...
1.7K

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相关实验视频

Updated: Jan 15, 2026

Coral Reef Arks: An In Situ Mesocosm and Toolkit for Assembling Reef Communities
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层次的带状结构,用于增强阻力降低和在水管道中更广泛的操作范围.

Mirvahid Mohammadpour Chehrghani1,2, Jamal Seyyed Monfared Zanjani1, Doekle Yntema2

  • 1Faculty of Engineering Technology, University of Twente, 7500AE Enschede, The Netherlands.

ACS ES&T water
|October 16, 2025
PubMed
概括
此摘要是机器生成的。

一个新的层次阶梯形带丝板 (HSR) 设计显著减少了饮用水配送系统的能源损失. 这种创新的表面技术即使在流量变化的条件下也保持了阻力降低,提高了管道效率.

关键词:
仿生表面是生物模拟的表面.饮用水分配 饮用水分配能源效率是指能效的能源效率.摩擦损失 摩擦损失 摩擦损失管道的流动管道的流动管道的流动在Riblets上,您可以使用Riblets.动荡的流动是流动的动荡.

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Visualization of Flow Field Around a Vibrating Pipeline Within an Equilibrium Scour Hole
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Visualization of Flow Field Around a Vibrating Pipeline Within an Equilibrium Scour Hole
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科学领域:

  • 流体动力学 流体动力学
  • 表面工程是什么?表面工程是什么?
  • 能源效率 能源效率 能源效率

背景情况:

  • 流管道流动中的皮肤摩擦阻力会导致饮用水配送系统 (DWDS) 的能源损失显著.
  • 像Riblets这样的被动减少阻力表面显示出希望,但在可变的流量条件下扎.
  • 现有的丝带设计在现实世界,波动的水管道环境中往往表现不佳.

研究的目的:

  • 开发和评估一种新的等级阶梯形带丝板 (HSR) 设计,以持续降低DWDS的阻力.
  • 在水管道典型的可变和波动的流量条件下提高阻力降低性能.
  • 调查多尺度几何调整和减少剪切暴露对阻力减轻的影响.

主要方法:

  • 使用高分辨率3D打印制造常规的 (CR),层次的 (HR) 和HSR设计.
  • 在模拟DWDS的可变流量条件下实验测试丝带性能.
  • 通过使用摩擦因子分析,在4200到20,000的雷诺德数范围内评估阻力减小.

主要成果:

  • 高压轮设计实现了11.2%的峰值阻力降低.
  • 与CR和HR设计相比,HSR在更广泛的流量条件下显示了持续的阻力降低.
  • 多尺度几何调整和在HSR中减少剪切暴露,提高了阻力降低性能.

结论:

  • 高压回流设计提供了一种可行的解决方案,用于减少饮用水配送管道中的能源损失.
  • 该研究强调了先进的表面几何学在改善动态流量条件下的管道效率方面的有效性.
  • 高压电流技术显示出在水基础设施中广泛应用的潜力,以节省能源.