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相关概念视频

Steady, Laminar Flow Between Parallel Plates01:17

Steady, Laminar Flow Between Parallel Plates

246
Understanding steady, laminar flow between parallel plates is essential for analyzing and designing flow in narrow rectangular channels, commonly found in various water conveyance and drainage systems. The Navier-Stokes equations govern fluid motion and are generally challenging to solve due to their nonlinearity. However, simplifications are possible in certain cases, like the steady laminar flow between parallel plates. For this scenario, we assume steady, incompressible, laminar flow.
246
Steady, Laminar Flow in Circular Tubes01:23

Steady, Laminar Flow in Circular Tubes

263
Hagen-Poiseuille flow describes a viscous fluid's steady, incompressible flow through a cylindrical tube with a constant radius R. This flow profile is often applied to understand fluid transport in narrow channels, such as capillaries. It serves as a foundational example of laminar flow. In this model, cylindrical coordinates (r,θ,z) are used to describe the radial (r), angular (θ), and axial (z) dimensions within the tube. For Hagen-Poiseuille flow, the velocity profile is...
263

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Analyzing Mixing Inhomogeneity in a Microfluidic Device by Microscale Schlieren Technique
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计算流体动力学模拟了蛇形微流体装置中的两相流动模式.

Younes Amini1, Valiyollah Ghazanfari2, Mehran Heydari2

  • 1Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute, Tehran, Iran. Y_amini@alum.sharif.edu.

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|June 10, 2023
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概括

这项研究分析了蛇形微通道中的液体-液体提取 (LLE) 流量. 研究人员发现,随着流速的变化,流量模式从slug转变为droplet或plug流,优化了微流体设备设计.

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科学领域:

  • 流体动力学 流体动力学
  • 微流体学 微流体学
  • 化学工程是化学工程的组成部分.

背景情况:

  • 液体液体提取 (LLE) 在化学过程中至关重要.
  • 了解微通道中的两相流程是流程优化的关键.
  • 蛇形微通道为LLE提供了独特的流动动态.

研究的目的:

  • 分析LLE在蛇形微通道中的流动行为.
  • 调查流速对两相流量模式的影响.
  • 对实验数据进行计算流体动力学 (CFD) 模拟的验证.

主要方法:

  • 使用3D计算流体动力学 (CFD) 模型进行模拟.
  • 对和水流进行了模拟.
  • 将模拟结果与实验数据进行比较以进行验证.

主要成果:

  • 污泥流在低流量时发生,类似于水相和有机相的流量.
  • 总体流量较高导致并行插头流量或滴滴流量.
  • 增加的水性流速转换了流向滴滴或插头流.

结论:

  • 蛇形微通道中的流量模式对相位流速敏感.
  • CFD模拟为研究微流体流体行为提供了一种具有成本效益的方法.
  • 这些发现有助于优化LLE应用的微流体装置设计.