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

Turbulent Flow01:24

Turbulent Flow

191
Turbulent flow is characterized by unpredictable fluctuations in velocity and pressure, which result in a chaotic fluid movement distinct from the orderly patterns of laminar flow. While laminar flow is governed by smooth, parallel layers with minimal mixing, turbulent flow exhibits highly irregular, three-dimensional patterns. This behavior arises due to instabilities in the fluid's velocity profile, and amplifies as the flow velocity increases. Minor disturbances, known as turbulent...
191
Turbulent Flow: Problem Solving01:09

Turbulent Flow: Problem Solving

130
Carbonation is a process used to dissolve carbon dioxide gas in a liquid, commonly used in the production of carbonated beverages. Achieving efficient carbonation requires careful control of temperature, pressure, and flow conditions. By adjusting these parameters, carbonation efficiency can be maximized, producing a higher concentration of CO2 in the liquid.
Temperature is a key factor in CO2 solubility. In this case, the CO2 gas and the liquid are cooled to 20°C. Lower temperatures...
130
Laminar and Turbulent Flow01:07

Laminar and Turbulent Flow

8.5K
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...
8.5K
Boundary Layer Characteristics01:18

Boundary Layer Characteristics

116
When a fluid encounters a solid surface, a boundary layer forms due to the interaction between the fluid's motion and the stationary surface. This phenomenon is characterized by a thin region adjacent to the surface where viscous forces dominate, influencing the fluid's velocity profile. The development of the boundary layer begins at the leading edge of the surface and evolves as the fluid moves downstream.As the fluid flows over the surface, friction between the fluid and the wall slows down...
116
Irrotational Flow01:28

Irrotational Flow

462
Irrotational flow is characterized by fluid motion where particles do not rotate around their axes, resulting in zero vorticity. For a flow to be irrotational, the curl of the velocity field must be zero. This imposes specific conditions on velocity gradients. For instance, to maintain zero rotation about the z-axis, the gradient condition:
462
Steady, Laminar Flow in Circular Tubes01:23

Steady, Laminar Flow in Circular Tubes

210
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...
210

You might also read

Related Articles

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

Sort by
Same author

Topological entropy of stationary three-dimensional turbulence.

Physical review. E·2026
Same author

Topological entropy of stationary two-dimensional turbulence.

Physical review. E·2025
Same author

Effective temperature and Einstein relation for particles in active matter flows.

Physical review. E·2022
Same author

Connecting relaxation time to a dynamical length scale in athermal active glass formers.

Physical review. E·2021

Related Experiment Video

Updated: Jul 5, 2025

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions
11:51

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions

Published on: February 22, 2018

8.7K

Persistence in active turbulence.

Amal Manoharan1, Sanjay Cp2, Ashwin Joy1

  • 1Department of Physics, Indian Institute of Technology Madras, Chennai 600036, India.

Physical Review. E
|January 20, 2024
PubMed
Summary

Active turbulence exhibits unique persistence times for tracers in vortices, following Weibull statistics unlike inertial turbulence. This behavior is driven by topological field decorrelation within vortices and vortex turnover time in the background.

More Related Videos

Three-dimensional Particle Tracking Velocimetry for Turbulence Applications: Case of a Jet Flow
13:02

Three-dimensional Particle Tracking Velocimetry for Turbulence Applications: Case of a Jet Flow

Published on: February 27, 2016

12.3K
Simultaneous Measurement of Turbulence and Particle Kinematics Using Flow Imaging Techniques
10:53

Simultaneous Measurement of Turbulence and Particle Kinematics Using Flow Imaging Techniques

Published on: March 12, 2019

7.0K

Related Experiment Videos

Last Updated: Jul 5, 2025

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions
11:51

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions

Published on: February 22, 2018

8.7K
Three-dimensional Particle Tracking Velocimetry for Turbulence Applications: Case of a Jet Flow
13:02

Three-dimensional Particle Tracking Velocimetry for Turbulence Applications: Case of a Jet Flow

Published on: February 27, 2016

12.3K
Simultaneous Measurement of Turbulence and Particle Kinematics Using Flow Imaging Techniques
10:53

Simultaneous Measurement of Turbulence and Particle Kinematics Using Flow Imaging Techniques

Published on: March 12, 2019

7.0K

Area of Science:

  • Physics
  • Fluid Dynamics
  • Soft Matter

Background:

  • Active fluids like bacterial swarms and cell tissues exhibit emergent complex behaviors.
  • These systems display spatiotemporal vortices, a phenomenon termed active turbulence, despite their overdamped nature.

Purpose of the Study:

  • To investigate the persistence problem of passive tracers within active turbulence.
  • To characterize the statistical properties of tracer persistence times in different regions of active turbulence.

Main Methods:

  • Utilized a generalized hydrodynamic model to simulate active turbulence.
  • Analyzed the persistence time of passive tracers within coherent vortices and the turbulent background.

Main Results:

  • Persistence time inside coherent vortices follows a Weibull distribution, dependent on activity strength.
  • In the turbulent background, persistence time is exponentially distributed.
  • Identified distinct drivers for persistence: temporal decorrelation of the topological field in vortices and vortex turnover time in the background.

Conclusions:

  • Active turbulence exhibits distinct statistical properties for tracer persistence compared to inertial turbulence.
  • The findings provide insights into the dynamics and underlying mechanisms governing active turbulence.