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相关概念视频

Dynamics of Circular Motion01:30

Dynamics of Circular Motion

An object undergoing circular motion, like a race car, is accelerating because it is changing the direction of its velocity. This centrally directed acceleration is called centripetal acceleration. This acceleration acts along the radius of the curved path (thus is also referred to as radial acceleration).
Any acceleration must be produced by some force. Therefore, any force or combination of forces can cause centripetal acceleration. A few examples include the tension in the rope on a...
Accelerating Fluids01:17

Accelerating Fluids

When a fluid is in constant acceleration, the pressure and buoyant force equations are modified. Suppose a beaker is placed in an elevator accelerating upward with a constant acceleration, a. In the beaker, assume there is a thin cylinder of height h with an infinitesimal cross-sectional area, ΔS.
The motion of the liquid within this infinitesimal cylinder is considered to obtain the pressure difference. Three vertical forces act on this liquid:
Steady, Laminar Flow Between Parallel Plates01:17

Steady, Laminar Flow Between Parallel Plates

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.

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相关实验视频

Updated: Jun 6, 2026

Micro-particle Image Velocimetry for Velocity Profile Measurements of Micro Blood Flows
07:53

Micro-particle Image Velocimetry for Velocity Profile Measurements of Micro Blood Flows

Published on: April 25, 2013

微流体系统:微流体中的高辐射加速.

J Patrick Shelby1, David S W Lim, Jason S Kuo

  • 1Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, USA.

Nature
|September 5, 2003
PubMed
概括

研究人员开发了一种能够实现高旋转速度和辐射加速的微流体微. 这项技术使得在微设备中的极端离心力下研究生物和化学过程成为可能.

科学领域:

  • 生物技术是生物技术.
  • 流体动力学 流体动力学
  • 微流体学 微流体学

背景情况:

  • 微流体系统可以快速分析生物样本.
  • 在微观尺度上控制流体动力学对于先进的应用至关重要.

研究的目的:

  • 为了描述一种新的微流体微.
  • 为了证明其产生高旋转速度和辐射加速的能力.

主要方法:

  • 在微流体系统中生成单个循环流 (微流体).
  • 测量流体旋转速度和辐射加速.

主要成果:

  • 达到最大的流体旋转速度高达12米/秒.
  • 生成的辐射加速度超过106g.
  • 证明了离心微器件中微螺纹的潜力.

结论:

  • 微型螺纹是微流体应用的强大工具.
  • 产生的高辐射加速可以用于研究极端条件下的生物和化学过程.

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A Microfluidic System with Surface Patterning for Investigating Cavitation Bubble(s)–Cell Interaction and the Resultant Bioeffects at the Single-cell Level

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