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

Colloids and Suspensions01:17

Colloids and Suspensions

2.7K
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...
2.7K
Colloids03:22

Colloids

19.4K
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 that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
19.4K
Viscosity of Fluid01:19

Viscosity of Fluid

901
Viscosity measures the resistance a fluid offers to flow and deformation. It results from internal friction between layers of fluid moving relative to one another. Dynamic viscosity, denoted by the Greek letter mu (μ), quantifies the force needed to move one fluid layer over another. For Newtonian fluids like water and air, the relationship between the shearing stress and the rate of shearing strain is linear, meaning their viscosity remains constant regardless of the applied stress.
901
Dimensionless Groups in Fluid Mechanics01:15

Dimensionless Groups in Fluid Mechanics

593
Dimensionless groups in fluid mechanics provide simplified ratios that help analyze fluid behavior without relying on specific units. The Reynolds number (Re), which represents the ratio of inertial to viscous forces, distinguishes between laminar and turbulent flows, making it essential in the design of pipelines and aerodynamic surfaces. The Froude number (Fr), the ratio of inertial to gravitational forces, is particularly useful in predicting wave formation and hydraulic jumps in...
593
Newtonian Fluid: Problem Solving01:18

Newtonian Fluid: Problem Solving

644
Newtonian fluids exhibit a constant viscosity, meaning their shear stress and shear strain rate are directly proportional. This property ensures a predictable and stable response to applied forces, maintaining a linear relationship between force and flow. Examples include water, air, and light oils, consistently demonstrating this proportional behavior regardless of external conditions.
A velocity gradient forms within the fluid when a Newtonian fluid is placed between two parallel plates, with...
644
Elastic Strain Energy for Shearing Stresses01:20

Elastic Strain Energy for Shearing Stresses

357
As discussed in previous lessons, strain energy in a material is the energy stored when it is elastically deformed, a concept crucial in materials science and mechanical engineering. This energy results from the internal work done against the cohesive forces within the material. When a material undergoes shearing stress and corresponding shearing strain, the strain energy density, which is the energy stored per unit volume, is calculated. Within the elastic limit, where the stress is...
357

You might also read

Related Articles

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

Sort by
Same author

Non-monotonic magnetic friction from collective rotor dynamics.

Nature materials·2026
Same author

Spontaneous demixing of a binary cell mixture induced by self-pulsation disparity in confluent tissues.

Physical review. E·2026
Same author

Systematic pan-cancer analysis reveals the prognostic and immunological roles of ectonucleoside triphosphate diphosphohydrolase 6.

World journal of clinical oncology·2025
Same author

Tunable colloidal swarmalators with hydrodynamic coupling.

Nature communications·2025
Same author

Energy recuperation of driven colloids in non-Markovian baths.

Nature communications·2025
Same author

Negative Drag Force on Beating Flagellar-Shaped Bodies in Active Fluids.

Physical review letters·2025

Related Experiment Video

Updated: Nov 14, 2025

Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures
10:56

Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures

Published on: May 20, 2014

12.4K

Active colloids under geometrical constraints in viscoelastic media.

N Narinder1, Wei-Jing Zhu1,2,3, Clemens Bechinger4

  • 1Fachbereich Physik, Universität Konstanz, Konstanz, Germany.

The European Physical Journal. E, Soft Matter
|March 11, 2021
PubMed
Summary

Active particles (APs) slow down near walls in viscoelastic fluids due to compression and torque. This research models APs in complex geometries, showing they navigate better in viscoelastic than Newtonian fluids.

More Related Videos

Experimental Measurement of Settling Velocity of Spherical Particles in Unconfined and Confined Surfactant-based Shear Thinning Viscoelastic Fluids
10:28

Experimental Measurement of Settling Velocity of Spherical Particles in Unconfined and Confined Surfactant-based Shear Thinning Viscoelastic Fluids

Published on: January 3, 2014

14.2K
Combining Microfluidics and Microrheology to Determine Rheological Properties of Soft Matter during Repeated Phase Transitions
11:38

Combining Microfluidics and Microrheology to Determine Rheological Properties of Soft Matter during Repeated Phase Transitions

Published on: April 19, 2018

8.2K

Related Experiment Videos

Last Updated: Nov 14, 2025

Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures
10:56

Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures

Published on: May 20, 2014

12.4K
Experimental Measurement of Settling Velocity of Spherical Particles in Unconfined and Confined Surfactant-based Shear Thinning Viscoelastic Fluids
10:28

Experimental Measurement of Settling Velocity of Spherical Particles in Unconfined and Confined Surfactant-based Shear Thinning Viscoelastic Fluids

Published on: January 3, 2014

14.2K
Combining Microfluidics and Microrheology to Determine Rheological Properties of Soft Matter during Repeated Phase Transitions
11:38

Combining Microfluidics and Microrheology to Determine Rheological Properties of Soft Matter during Repeated Phase Transitions

Published on: April 19, 2018

8.2K

Area of Science:

  • Physics of complex fluids
  • Soft matter physics
  • Biophysics

Background:

  • Active particles (APs) exhibit unique behaviors in fluids.
  • Viscoelastic fluids possess both viscous and elastic properties.
  • Geometrical confinements significantly influence particle dynamics.

Purpose of the Study:

  • To investigate the behavior of active particles in viscoelastic fluids within confined geometries.
  • To understand the mechanisms behind particle slowdown and orientational changes near walls.
  • To develop and validate a numerical model for active particle dynamics in complex environments.

Main Methods:

  • Numerical simulations of active particle motion.
  • Analysis of particle trajectories and orientation.
  • Comparison of simulation results with experimental data.

Main Results:

  • Active particles experience fluid compression and viscoelastic torques near walls, causing deceleration and reorientation.
  • The developed numerical model accurately predicts active particle behavior and aligns with experimental findings.
  • Active particles navigate complex geometries more efficiently in viscoelastic fluids compared to Newtonian fluids.

Conclusions:

  • Viscoelasticity plays a crucial role in active particle dynamics near boundaries.
  • The numerical model provides a versatile tool for studying active matter in diverse confined systems.
  • Suspension in viscoelastic fluids enhances the ability of active particles to traverse intricate structures.