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Related Concept Videos

Turbulent Flow01:24

Turbulent Flow

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 spots,...
Genetic Drift03:33

Genetic Drift

Natural selection—probably the most well-known evolutionary mechanism—increases the prevalence of traits that enhance survival and reproduction. However, evolution does not merely propagate favorable traits, nor does it always benefit populations.
Carrier Transport01:21

Carrier Transport

The generation of electrical current in semiconductors is fundamentally driven by two mechanisms: drift and diffusion. These processes are essential for the functionality and performance of semiconductor-based devices.
Drift Current:
The drift of charge carriers is started by an external electric field (E). Charged particles, such as electrons and holes, experience an acceleration between collisions with lattice atoms. For electrons, this results in a drift velocity (vd) given by:
Laminar and Turbulent Flow01:07

Laminar and Turbulent Flow

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Reynolds Transport Theorem

The Reynolds transport theorem provides a framework to relate the time rate of change of an extensive property within a system to that in a control volume, which is crucial for analyzing fluid dynamics. Extensive properties, such as mass, velocity, acceleration, temperature, and momentum, can be expressed in terms of the mass of a fluid portion. These properties are called extensive because they depend on the system's size, while intensive properties are their corresponding values per unit mass.
Navier–Stokes Equations01:28

Navier–Stokes Equations

For incompressible Newtonian fluids, where density remains constant, stresses show a linear relationship with the deformation rate, defined by normal and shear stresses. Normal stresses depend on the pressure exerted on the fluid and the rate of deformation in specific directions, which determines how fluid flows under varying pressures. Shear stresses, on the other hand, act tangentially across fluid layers. They explain how adjacent fluid layers slide relative to one another, connecting...

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Related Experiment Video

Updated: May 10, 2026

A Microfluidic-based Hydrodynamic Trap for Single Particles
10:13

A Microfluidic-based Hydrodynamic Trap for Single Particles

Published on: January 21, 2011

Ion stochastic trapping and drift turbulence evolution.

Madalina Vlad1

  • 1National Institute of Laser, Plasma and Radiation Physics, Bucharest, Romania. madalina.vlad@inflpr.ro

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|June 18, 2013
PubMed
Summary

Stochastic ion trapping in magnetized plasmas influences turbulent evolution. This mechanism generates large-scale correlations and zonal flow modes in drift turbulence.

Area of Science:

  • Plasma Physics
  • Turbulence Studies

Background:

  • Turbulent magnetized plasmas exhibit complex dynamics.
  • E×B drift is a key feature in plasma turbulence.

Purpose of the Study:

  • Investigate the role of stochastic ion trapping in magnetized plasma turbulence.
  • Understand the nonlinear processes governing drift turbulence evolution.

Main Methods:

  • Analysis of test modes in turbulent magnetized plasmas.
  • Incorporation of stochastic ion trapping effects.

Main Results:

  • Ion trapping acts as a significant physical mechanism.
  • Observed generation of large-scale correlations.
  • Identified generation of zonal flow modes.

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Related Experiment Videos

Last Updated: May 10, 2026

A Microfluidic-based Hydrodynamic Trap for Single Particles
10:13

A Microfluidic-based Hydrodynamic Trap for Single Particles

Published on: January 21, 2011

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

Conclusions:

  • Stochastic ion trapping is crucial for nonlinear drift turbulence.
  • This mechanism drives the formation of large-scale structures and zonal flows.