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相关概念视频

Couette Flow01:22

Couette Flow

1.2K
Couette flow represents the flow of fluid between two parallel plates, with one plate fixed and the other moving with a constant velocity. This configuration allows for a simplified analysis using the Navier-Stokes equations, which govern fluid motion under conditions of viscosity and incompressibility. For Couette flow, the assumptions include a steady, laminar, incompressible flow with a zero-pressure gradient in the flow direction. This flow type is beneficial for understanding shear-driven...
1.2K
Steady, Laminar Flow Between Parallel Plates01:17

Steady, Laminar Flow Between Parallel Plates

936
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.
936

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相关实验视频

Updated: Mar 6, 2026

A Microfluidic-based Hydrodynamic Trap for Single Particles
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对于非接触式颗粒捕获的振荡流.

Gabrielle Saint-Girons1,2, Kaustav A Gopinathan1,3, Sajad Razavi Bazaz1,4,3

  • 1BioMEMS Resource Center, Center for Engineering in Medicine and Surgical Services, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, 02114, USA. jedd@mgb.org.

Lab on a chip
|March 5, 2026
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概括
此摘要是机器生成的。

我们开发了一种新的微流体振荡不对称陷 (MOAT),用于无接触的粒子操纵. 这种技术克服了现有方法的局限性,使得在几何不对称的装置中使用压力振荡实现稳定的捕获.

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Assembly and Characterization of an External Driver for the Generation of Sub-Kilohertz Oscillatory Flow in Microchannels
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Fabrication and Operation of a Nano-Optical Conveyor Belt
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相关实验视频

Last Updated: Mar 6, 2026

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Assembly and Characterization of an External Driver for the Generation of Sub-Kilohertz Oscillatory Flow in Microchannels
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Fabrication and Operation of a Nano-Optical Conveyor Belt
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科学领域:

  • 微流体学 微流体学
  • 生物物理学的生物物理.
  • 流体动力学 流体动力学

背景情况:

  • 现有的无接触的微流体捕获方法 (光学,声学,电离子) 有局限性.
  • 这些局限性包括受限制的捕捞区,复杂的调整,以及需要专门的缓冲区.

研究的目的:

  • 引入一种新的无接触捕获技术:微流体振荡不对称陷 (MOAT).
  • 克服微流体装置中稳定颗粒捕获现有方法的局限性.

主要方法:

  • 通过对3D打印的平面扩展芯片进行实验,研究了MOAT现象.
  • 进行数值模拟来分析捕捉行为.
  • 测量了捕获效率和强度.

主要成果:

  • 在具有流向几何不对称的设备中使用压力振荡证明了稳定,无接触的捕获.
  • 通过各种粒子类型 (从塑料珠到细胞系) 和设备观察到捕获.
  • 确定了捕捉的最佳条件,并通过上游惯性聚焦进行了增强.

结论:

  • MOAT是一种多功能且有效的方法,用于在微流体中无接触地捕获颗粒.
  • 这种现象依赖于非对称几何体中的振荡雷诺兹数依赖动力学.
  • MOAT为现有的捕捞技术提供了一个有希望的替代方案,具有广泛的适用性.