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

3.8K
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...
3.8K
Steady, Laminar Flow Between Parallel Plates01:17

Steady, Laminar Flow Between Parallel Plates

982
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.
982
Newtonian Fluid: Problem Solving01:18

Newtonian Fluid: Problem Solving

1.1K
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...
1.1K
Steady, Laminar Flow in Circular Tubes01:23

Steady, Laminar Flow in Circular Tubes

1.4K
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 axial,...
1.4K
Colloids03:22

Colloids

22.0K
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...
22.0K
Viscosity of Fluid01:19

Viscosity of Fluid

2.2K
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.
2.2K

You might also read

Related Articles

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

Sort by
Same author

Molecular Dynamics Simulation Study on the Stabilization of Interferon-α2a Protein by Poly(ethylene glycol) and Polysarcosine.

Langmuir : the ACS journal of surfaces and colloids·2026
Same author

Self-assembly of magnetic Janus colloids with radially shifted dipoles under an external magnetic field.

Soft matter·2025
Same author

Molecular Nanosolids Generation by Vapor Jet Desublimation.

Advanced materials (Deerfield Beach, Fla.)·2025
Same author

Time-dependent clustering and magnetization in magnetic colloidal suspensions.

Soft matter·2025
Same author

Rheology, dynamics, and mechanisms of self-healing of polydimethylsiloxane dual-linked by ureido and dynamic imine bonds.

Journal of colloid and interface science·2025
Same author

The size ratio effect on the microstructure and magnetization of a bidisperse magnetic colloidal suspension.

Soft matter·2025

Related Experiment Video

Updated: Mar 24, 2026

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

8.6K

Rich Janus colloid phase behavior under steady shear.

Ronal A DeLaCruz-Araujo1, Daniel J Beltran-Villegas, Ronald G Larson

  • 1Department of Chemical Engineering, University of Puerto Rico - Mayagüez, Mayagüez, PR 00681, USA. ubaldom.cordova@upr.edu.

Soft Matter
|March 19, 2016
PubMed
Summary

Colloidal Janus particles form diverse aggregates. Under shear flow, these structures dynamically rearrange, grow, and break apart, offering new possibilities for reconfigurable materials.

More Related Videos

Challenges in Rheological Characterization of Highly Concentrated Suspensions — A Case Study for Screen-printing Silver Pastes
08:42

Challenges in Rheological Characterization of Highly Concentrated Suspensions — A Case Study for Screen-printing Silver Pastes

Published on: April 10, 2017

20.6K
Dielectric RheoSANS — Simultaneous Interrogation of Impedance, Rheology and Small Angle Neutron Scattering of Complex Fluids
07:51

Dielectric RheoSANS — Simultaneous Interrogation of Impedance, Rheology and Small Angle Neutron Scattering of Complex Fluids

Published on: April 10, 2017

10.9K

Related Experiment Videos

Last Updated: Mar 24, 2026

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

8.6K
Challenges in Rheological Characterization of Highly Concentrated Suspensions — A Case Study for Screen-printing Silver Pastes
08:42

Challenges in Rheological Characterization of Highly Concentrated Suspensions — A Case Study for Screen-printing Silver Pastes

Published on: April 10, 2017

20.6K
Dielectric RheoSANS — Simultaneous Interrogation of Impedance, Rheology and Small Angle Neutron Scattering of Complex Fluids
07:51

Dielectric RheoSANS — Simultaneous Interrogation of Impedance, Rheology and Small Angle Neutron Scattering of Complex Fluids

Published on: April 10, 2017

10.9K

Area of Science:

  • Colloidal science
  • Soft matter physics
  • Computational materials science

Background:

  • Colloidal Janus particles exhibit complex self-assembly into structures like micelles, wormlike clusters, vesicles, and lamellae.
  • The behavior of these aggregates is influenced by factors such as patch size and interaction potential.
  • Understanding their response to external forces is crucial for materials applications.

Purpose of the Study:

  • To investigate the assembly and dynamic behavior of single-patch colloidal Janus particles under steady shear flow.
  • To elucidate the role of Péclet number (Pe) in aggregate rearrangement, deformation, and break-up.
  • To explore how varying particle properties and flow conditions impact aggregate morphology and size.

Main Methods:

  • Brownian dynamics simulations were employed to model particle interactions and dynamics.
  • System parameters, including Janus patch size, interaction potential, and shear rate, were systematically varied.
  • Aggregate formation, evolution, and dissociation were analyzed across a range of Péclet numbers.

Main Results:

  • In the absence of flow, diverse aggregates form based on particle properties.
  • Under shear, aggregates undergo rearrangement, deformation, and break-up.
  • Micelles and vesicles initially grow with increasing Péclet number, reaching maximum sizes before dissociating.
  • Wormlike clusters and lamellae exhibit distinct break-up pathways and alignments with flow.
  • Aggregate morphology and size are sensitive to interaction range, patch size, interaction strength, and shear rate.

Conclusions:

  • Shear flow significantly alters the self-assembly and stability of Janus particle aggregates.
  • The Péclet number dictates the transition from ordered structures to a dilute colloidal gas.
  • Observed shear-induced dynamics provide pathways for controlling reconfigurable materials and novel applications.