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相关概念视频

Capillarity in Fluid01:19

Capillarity in Fluid

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Capillarity describes the movement of liquid in small spaces without external forces acting on it. The capillarity is driven by surface tension and adhesive interactions between the liquid and surrounding solid surfaces. This effect is often seen in narrow tubes, porous materials, and fine particles.
Surface tension is crucial to capillarity. It results from cohesive forces between liquid molecules at the liquid-air boundary, forming a skin that resists external forces. When the capillary tube...
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Steady, Laminar Flow Between Parallel Plates01:17

Steady, Laminar Flow Between Parallel Plates

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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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Fluid Pressure over Curved Plate of Constant Width01:12

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When a curved plate of constant width is submerged in a liquid, the pressure acting normal to the plate varies continuously both in magnitude and direction. Calculating the magnitude and location of the resultant force at a point is often challenging for such cases. One of the methods to determine the resultant force and its location involves separately calculating the horizontal and vertical components of the resultant force. This complex calculation can be simplified by representing the...
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Pressure of Fluids01:14

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There are many examples of pressure in fluids in everyday life, such as in relation to blood (high or low blood pressure) and in relation to weather (high- and low-pressure weather systems). A given force can have a significantly different effect, depending on the area over which the force is exerted. For instance, a force applied to an area of 1 mm2 has a pressure that is 100 times greater than the same force applied to an area of 1 cm2. That's why a sharp needle is able to poke through...
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Excess Pressure Inside a Drop and a Bubble01:13

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The shape of a small drop of liquid can be considered spherical, neglecting the effect of gravity. This drop can further be considered as two equal hemispherical drops put together due to surface tension. The forces acting on the spherical drop are due to the pressure of the liquid inside the drop, the pressure due to air outside the drop, and the force due to the surface tension acting on the two hemispherical drops.
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Accelerating Fluids01:17

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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:
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相关实验视频

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A Microfluidic Platform to Study Bioclogging in Porous Media
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架构孔状介质中的三维泡流体学

Jonathan T Davis1, Kansas Seung1, Anna Guell Izard1

  • 1Materials Engineering Division, Lawrence Livermore National Laboratory, Livermore, California 94551, United States.

ACS applied materials & interfaces
|September 11, 2025
PubMed
概括

研究人员展示了3D打印的多孔结构,用于确定性控制气液流. 这一创新使工程系统中多相流体动态的精确管理成为可能.

关键词:
3D微流体学 3D微流体学通过3D打印打印3D打印.泡 泡 泡 是一种气泡.毛细血管运输是指毛细血管运输.气体交易所的气体交易所逻辑大门的逻辑大门.多相流是指多相流的情况.有孔的材料是多孔的材料.

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科学领域:

  • 流体动力学 流体动力学
  • 材料科学 材料科学 材料科学
  • 化学工程是化学工程的重要组成部分.

背景情况:

  • 气泡流在多孔介质中是复杂的,难以控制的,阻碍了有效的多相流装置的设计.
  • 目前的方法缺乏对多孔材料内的气液接口的决定性控制.

研究的目的:

  • 为了证明3D打印的孔隙设计如何可以确定性地控制气流流路径.
  • 探索用于控制相位分布的成形气/液接口的使用.
  • 为了利用受控的气液相互作用,用于逻辑控制门和优化生物反应器等应用.

主要方法:

  • 使用3D打印设计和制造定制的开放细胞多孔结构.
  • 研究这些工程孔内的气体/液体接口的形状.
  • 利用气体的受控分布来进行物理和化学相互作用.

主要成果:

  • 3D打印的孔隙设计可以对气体流路进行决定性控制.
  • 工程孔隙架构有效地塑造气/液接口,控制相位分布.
  • 证明了对受控的气液相互作用的使用,以创建流量重定向的逻辑控制门.
  • 展示了设计反应性捕获和空气化生物反应器架构的潜力.

结论:

  • 3D打印的多孔介质为精确控制多相流提供了一种新的方法.
  • 工程孔状几何结构为先进的流体管理和化学/物理过程强化提供了一个平台.
  • 这种方法促进了用于化学加工和生物技术应用的复杂设备的开发.