Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Steady, Laminar Flow in Circular Tubes01:23

Steady, Laminar Flow in Circular Tubes

2.0K
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 purely...
2.0K
Laminar and Turbulent Flow01:07

Laminar and Turbulent Flow

9.6K
Fluid dynamics is the study of fluids in motion. Velocity vectors are often used to illustrate fluid motion in applications like meteorology. For example, wind—the fluid motion of air in the atmosphere—can be represented by vectors indicating the speed and direction of the wind at any given point on a map. Another method for representing fluid motion is a streamline. A streamline represents the path of a small volume of fluid as it flows. When the flow pattern changes with time, the...
9.6K
Capillarity in Fluid01:19

Capillarity in Fluid

1.5K
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...
1.5K
Steady, Laminar Flow Between Parallel Plates01:17

Steady, Laminar Flow Between Parallel Plates

1.1K
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.
1.1K
Design Example: Flow of Oil Through Circular Pipes01:25

Design Example: Flow of Oil Through Circular Pipes

586
Understanding fluid flow behavior through pipes is critical in fluid mechanics, especially in applications like oil transportation through pipelines. Hagen-Poiseuille's law provides an exact solution derived from the Navier-Stokes equations for steady, incompressible, and laminar flow within a circular pipe. Hagen-Poiseuille's law helps determine the necessary pressure drop across a pipeline section by determining parameters like pipe length, radius, oil viscosity, and the desired volumetric...
586
Introduction to Types of Flows01:23

Introduction to Types of Flows

1.9K
Fluid flows are categorized by dimensionality and behavior, with one-dimensional flow being the simplest form, where properties like velocity and pressure change only along a single axis. Water moving through straight pipes exemplifies this flow type, as variations in other directions are minimal. One-dimensional analysis helps simplify understanding such flows, focusing solely on changes along the pipe's length.
Two-dimensional flow involves changes in both length and height, as seen in...
1.9K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Spore-Forming Probiotic-Embedded Biomaterials for Targeted Gut Microplastic Biodegradation.

ACS pharmacology & translational science·2026
Same author

Corrigendum to "Rubusoside mitigates neuroinflammation and cellular apoptosis in Parkinson's disease, and alters gut microbiota and metabolite composition" [Phytomedicine, February 2024, 155309, Volume 124].

Phytomedicine : international journal of phytotherapy and phytopharmacology·2026
Same author

Thermoresponsive Nanoparticles Hijack Neutrophils In Vivo to In Situ Construct Biohybrids for Enhanced Cancer and Infection Therapy.

ACS nano·2026
Same author

Employing molecular beacons to assess in vitro transcription with single-molecule resolution.

Scientific reports·2026
Same author

Definitive radiotherapy provides comparable survival with lower toxicity compared with concurrent chemoradiotherapy after long-course induction chemoimmunotherapy in unresectable non-small-cell lung cancer.

Therapeutic advances in medical oncology·2026
Same author

Impact of chemotherapy dose reduction during concurrent chemoradiotherapy on survival outcomes in limited-stage small-cell lung cancer.

BMC cancer·2026

Related Experiment Video

Updated: Apr 26, 2026

Capillary-based Centrifugal Microfluidic Device for Size-controllable Formation of Monodisperse Microdroplets
08:20

Capillary-based Centrifugal Microfluidic Device for Size-controllable Formation of Monodisperse Microdroplets

Published on: February 22, 2016

9.9K

On the flow topology inside droplets moving in rectangular microchannels.

Shaohua Ma1, Joseph M Sherwood, Wilhelm T S Huck

  • 1Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, UK.

Lab on a Chip
|July 30, 2014
PubMed
Summary

Flow topology in moving microdroplets is crucial for applications. This study reveals viscosity ratio, not capillary number, dictates flow patterns inside droplets in microchannels.

More Related Videos

High Speed Droplet-based Delivery System for Passive Pumping in Microfluidic Devices
10:22

High Speed Droplet-based Delivery System for Passive Pumping in Microfluidic Devices

Published on: September 2, 2009

13.0K
Generation of Size-controlled Poly ethylene Glycol Diacrylate Droplets via Semi-3-Dimensional Flow Focusing Microfluidic Devices
11:08

Generation of Size-controlled Poly ethylene Glycol Diacrylate Droplets via Semi-3-Dimensional Flow Focusing Microfluidic Devices

Published on: July 3, 2018

7.0K

Related Experiment Videos

Last Updated: Apr 26, 2026

Capillary-based Centrifugal Microfluidic Device for Size-controllable Formation of Monodisperse Microdroplets
08:20

Capillary-based Centrifugal Microfluidic Device for Size-controllable Formation of Monodisperse Microdroplets

Published on: February 22, 2016

9.9K
High Speed Droplet-based Delivery System for Passive Pumping in Microfluidic Devices
10:22

High Speed Droplet-based Delivery System for Passive Pumping in Microfluidic Devices

Published on: September 2, 2009

13.0K
Generation of Size-controlled Poly ethylene Glycol Diacrylate Droplets via Semi-3-Dimensional Flow Focusing Microfluidic Devices
11:08

Generation of Size-controlled Poly ethylene Glycol Diacrylate Droplets via Semi-3-Dimensional Flow Focusing Microfluidic Devices

Published on: July 3, 2018

7.0K

Area of Science:

  • Fluid dynamics
  • Microfluidics
  • Interfacial phenomena

Background:

  • Flow topology in microdroplets significantly impacts encapsulated objects and technological applications.
  • Understanding droplet behavior in microchannels is essential for developing advanced microfluidic devices.

Purpose of the Study:

  • To systematically investigate the flow field inside moving water/oil droplets in a rectangular microchannel.
  • To elucidate the effects of capillary number, droplet geometry, viscosity ratio, and interfacial tension on droplet flow topology.

Main Methods:

  • Utilized micro-particle image velocimetry (μPIV) for detailed flow field analysis.
  • Studied various water/oil (w/o) fluid mixtures under different experimental conditions.

Main Results:

  • Observed a distinct change in flow topology at intermediate capillary numbers (10^-3 to 10^-1) in surfactant-laden droplets.
  • Attributed the flow topology change primarily to the viscosity ratio, not the Marangoni effect.
  • Found that increasing viscosity ratio leads to a more uniform flow pattern within the droplet.
  • Capillary number and droplet geometry did not affect the observed flow topology change.

Conclusions:

  • The viscosity ratio is a key parameter for controlling flow patterns in moving microdroplets.
  • Flow topology inside droplets in rectangular microchannels is complex and three-dimensional (3D).
  • Adjusting the viscosity ratio offers a method to control the droplet flow environment for microfluidic applications.