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

921
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...
921
Irrotational Flow01:28

Irrotational Flow

1.3K
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:
1.3K
Elastic Strain Energy for Shearing Stresses01:20

Elastic Strain Energy for Shearing Stresses

668
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...
668
Drift Velocity01:19

Drift Velocity

4.9K
The high speed of electrical signals results from the fact that the force between charges acts rapidly at a distance. Thus, when a free charge is forced into a wire, the incoming charge pushes other charges ahead due to the repulsive force between like charges. These moving charges move the charges farther down the line. The density of charge in a system cannot easily be increased, so the signal is passed on rapidly. The resulting electrical shock wave moves through the system at nearly the...
4.9K
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
Velocity Potential01:20

Velocity Potential

939
In steady, incompressible flow through a long, straight pipe with a uniform cross-section, the flow in the central region (far from the pipe walls) is irrotational. This irrotational nature means that fluid particles do not rotate around their axes, and a scalar function called the velocity potential, represented by ϕ, can be used to describe their movement. In irrotational flows, the velocity field V is defined as the gradient of the velocity potential:
939

You might also read

Related Articles

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

Sort by
Same author

Nonlinear phase synchronization and the role of spacing in shell models.

Physical review. E·2026
Same author

Microturbulence Suppression by Alfvén Eigenmodes in the DIII-D Tokamak.

Physical review letters·2026
Same author

Multi-scale Interaction Mechanism for Edge-Localized-Mode Suppression in the Tokamak Edge.

Nature communications·2025
Same author

Physics of Edge-Core Coupling by Inward Turbulence Propagation.

Physical review letters·2025
Same author

Layered patterns of active scalar fields in a two-dimensional magnetohydrodynamic system.

Physical review. E·2025
Same author

Shell models on recurrent sequences: Fibonacci, Padovan, and other series.

Physical review. E·2025

Related Experiment Video

Updated: Apr 29, 2026

Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing
08:54

Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing

Published on: February 13, 2018

8.1K

Elasticity in drift-wave-zonal-flow turbulence.

Z B Guo1, P H Diamond2, Y Kosuga3

  • 1WCI Center for Fusion Theory, NFRI, Daejeon 305-333, South Korea.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|May 16, 2014
PubMed
Summary

Turbulent elasticity in drift-wave-zonal-flow turbulence causes momentum transport to shift from diffusive to wavelike propagation. This explains periodic zonal flows observed in plasma confinement regimes.

More Related Videos

AFM and Microrheology in the Zebrafish Embryo Yolk Cell
09:47

AFM and Microrheology in the Zebrafish Embryo Yolk Cell

Published on: November 29, 2017

7.9K
Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section
11:00

Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section

Published on: July 19, 2016

10.3K

Related Experiment Videos

Last Updated: Apr 29, 2026

Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing
08:54

Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing

Published on: February 13, 2018

8.1K
AFM and Microrheology in the Zebrafish Embryo Yolk Cell
09:47

AFM and Microrheology in the Zebrafish Embryo Yolk Cell

Published on: November 29, 2017

7.9K
Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section
11:00

Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section

Published on: July 19, 2016

10.3K

Area of Science:

  • Plasma Physics
  • Fluid Dynamics
  • Turbulence Theory

Background:

  • Drift-wave-zonal-flow (DW-ZF) turbulence is crucial in plasma confinement.
  • Understanding the dynamics of zonal flows (ZF) is key to improving plasma stability.

Purpose of the Study:

  • To develop a theory of turbulent elasticity in DW-ZF turbulence.
  • To identify a parameter governing the breakdown of the Fickian flux-gradient relation.
  • To explain the transition of turbulent momentum transport from diffusive to wavelike behavior.

Main Methods:

  • Theoretical modeling of DW-ZF turbulence.
  • Analysis of the ZF evolution equation under varying turbulence conditions.
  • Derivation of the ZF frequency based on friction and growth rates.

Main Results:

  • Introduced turbulent elasticity as a property arising from time delays in DW response to ZF shears.
  • Identified the dimensionless parameter |〈v〉'|/Δωk as a measure of Fickian relation breaking.
  • Showed that for |〈v〉'|/Δωk>1, the ZF equation transitions from diffusion to a telegraph equation, indicating wavelike transport.
  • Derived the ZF wave frequency as ΩZF=±γd1/2γmodu1/2.

Conclusions:

  • Turbulent elasticity provides a framework for understanding wavelike momentum transport in DW-ZF systems.
  • The findings explain temporally periodic ZF structures, particularly in the Dimits shift regime.
  • This theory is relevant for understanding transitions in plasma confinement, such as L-mode to H-mode.