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Related Experiment Videos

Nonlinear effects in the bounded dust-vortex flow in plasma.

Modhuchandra Laishram1, Devendra Sharma1, Prabal K Chattopdhyay1

  • 1Institute for Plasma Research, HBNI, Bhat, Gandhinagar 382428, India.

Physical Review. E
|April 19, 2017
PubMed
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Vortex dynamics in dusty plasma reveal nonlinear flow regimes. Critical viscosity triggers structural bifurcations, forming scaled vortices applicable to planetary and cellular phenomena.

Area of Science:

  • Plasma physics
  • Fluid dynamics
  • Nonlinear dynamics

Background:

  • Electrically suspended dust in streaming plasma exhibits complex vortex structures.
  • Toroidal formations observed experimentally suggest a rich nonlinear flow regime.

Purpose of the Study:

  • Investigate the volumetrically driven-dissipative vortex flow dynamics of dusty plasma.
  • Understand the nonlinear equilibrium solutions and structural bifurcations in this system.

Main Methods:

  • Utilized two-dimensional hydrodynamics in the incompressible Navier-Stokes regime.
  • Analyzed nonlinear equilibrium solutions for nonuniformly driven two-dimensional dust flow.

Main Results:

  • Identified distinct regions of localized accelerations and strong friction due to boundary effects.

Related Experiment Videos

  • Demonstrated nonlinear effects appearing in the limit of small viscosity.
  • Observed primary vortices scaling with domain topology and developing separated virtual boundaries beyond critical viscosity.

    • Conclusions:

    • The critical dust viscosity signifies a structural bifurcation, leading to uniform vorticity cores and secondary vortices.
    • The studied vortex dynamics are applicable to diverse phenomena, from Jupiter's Great Red Spot to intracellular biophysics.