Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Stokes' Law01:20

Stokes' Law

1.2K
Viscous forces, like friction, are intermolecular forces that resist the relative motion of molecules over each other. When a solid body moves through a liquid, viscous forces drag it in the opposite direction. The force's magnitude depends on the solid's shape and size, as well as its speed and the liquid's coefficient of viscosity, density and temperature.
The expression for the force on a solid spherical object in a fluid is called Stokes' law. Stokes' law is valid only...
1.2K
Steady, Laminar Flow Between Parallel Plates01:17

Steady, Laminar Flow Between Parallel Plates

172
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.
172
Steady, Laminar Flow in Circular Tubes01:23

Steady, Laminar Flow in Circular Tubes

187
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...
187
Capillarity in Fluid01:19

Capillarity in Fluid

179
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...
179
Accelerating Fluids01:17

Accelerating Fluids

1.0K
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:
1.0K
Colloids and Suspensions01:17

Colloids and Suspensions

1.8K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles visible to the naked eye or seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. The suspended particles in a suspension settle out after some time of mixing. The separation of particles from a suspension is...
1.8K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Helical opto-thermoviscous flows drive out-of-plane rotation and particle spinning in a highly viscous micro-environment.

Light, science & applications·2026
Same author

Rotation reversal of chiral bacterial vortices.

Soft matter·2025
Same author

A Marangoni swimmer pushing a particle raft under 1D confinement.

Soft matter·2025
Same author

Modal analysis and optimization of swimming active filaments.

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences·2025
Same author

Load-dependent resistive-force theory for helical filaments.

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences·2025
Same author

Optical Micromanipulations Based on Model Predictive Control of Thermoviscous Flows.

Small (Weinheim an der Bergstrasse, Germany)·2025
Same journal

Nanopore sequencing with proteins: synchronization and dischronization of molecular dynamics simulations with laboratory and industrial developments.

Soft matter·2026
Same journal

Catanionics from biosurfactants and regular surfactants: miscibility and structure.

Soft matter·2026
Same journal

Adhesives with a thickness smaller than the fractocohesive length enhance adhesion.

Soft matter·2026
Same journal

Non-equilibrium phase transitions in hybrid Voronoi models of cell colonies.

Soft matter·2026
Same journal

Effects of methoxy substituents on self-assembly and gelation performance of benzamide-based organogelators.

Soft matter·2026
Same journal

Rheology of <i>Escherichia coli</i> suspensions with various bacterial morphologies and motion characteristics.

Soft matter·2026
查看所有相关文章

相关实验视频

Updated: Jun 24, 2025

Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System
08:19

Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System

Published on: May 9, 2021

2.2K

通过粘性流介导的体泡推进.

Alexander Chamolly1,2, Sébastien Michelin3, Eric Lauga4

  • 1Institut Pasteur, Université Paris Cité, CNRS UMR3738, Developmental and Stem Cell Biology Department, F-75015 Paris, France. alexander.chamolly@pasteur.fr.

Soft matter
|June 5, 2024
PubMed
概括
此摘要是机器生成的。

这项研究提出了催化合体中的气泡推进的新理论,解释了它们的运动和各种参数的影响. 一些观察到的行为可能是由于实验设置,而不是核心推进物理.

更多相关视频

A Microfluidic System with Surface Patterning for Investigating Cavitation Bubble(s)&#8211;Cell Interaction and the Resultant Bioeffects at the Single-cell Level
11:14

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

Published on: January 10, 2017

11.7K
Fabricating High-viscosity Droplets using Microfluidic Capillary Device with Phase-inversion Co-flow Structure
08:02

Fabricating High-viscosity Droplets using Microfluidic Capillary Device with Phase-inversion Co-flow Structure

Published on: April 17, 2018

10.4K

相关实验视频

Last Updated: Jun 24, 2025

Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System
08:19

Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System

Published on: May 9, 2021

2.2K
A Microfluidic System with Surface Patterning for Investigating Cavitation Bubble(s)&#8211;Cell Interaction and the Resultant Bioeffects at the Single-cell Level
11:14

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

Published on: January 10, 2017

11.7K
Fabricating High-viscosity Droplets using Microfluidic Capillary Device with Phase-inversion Co-flow Structure
08:02

Fabricating High-viscosity Droplets using Microfluidic Capillary Device with Phase-inversion Co-flow Structure

Published on: April 17, 2018

10.4K

科学领域:

  • 微型机器的物理学
  • 流体动力学 流体动力学
  • 体科学是一门学科.

背景情况:

  • 气泡驱动的催化合体是高效的微机器,但缺乏理论框架.
  • 了解它们的推进力对于开发可控制的人工微型设备至关重要.

研究的目的:

  • 在催化合物中开发泡推进的一般理论框架.
  • 解释微机推进的基础物理和参数影响.
  • 分析泡生长动态和产生的流体流.

主要方法:

  • 开发了一种联合的扩散和水力动力学理论,用于在球形催化合物附近的泡生长.
  • 确定了控制泡增长动态的关键无维群.
  • 在滑动和无滑动边界条件下分析计算的流体流量.

主要成果:

  • 在泡增长中确定了两个无维群控制结分叉的无维群.
  • 提供流体流量生成的分析计算.
  • 该模型解释了环境和材料参数对推进的影响.

结论:

  • 开发的理论为理解气泡驱动的催化合体提供了一个框架.
  • 一些观察到的现象,比如状运动,可能起源于实验文物.
  • 进一步的研究可以完善对这些人工微机器的理解.