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Related Experiment Videos

Periodic boundary motion in thermal turbulence

Zhang1, Libchaber

  • 1Center for studies in Physics and Biology, Rockefeller University, New York, New York 10021 and Applied Mathematics Laboratory, Courant Institute, New York University, New York, New York 10012, USA.

Physical Review Letters
|September 16, 2000
PubMed
Summary

A free-floating plate in a Benard convection cell exhibits periodic motion. Its oscillation period depends on coverage and system parameters, potentially modeling geological continental drift.

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Area of Science:

  • Fluid dynamics
  • Heat transfer
  • Geophysics

Background:

  • Benard convection is a fundamental fluid dynamics phenomenon.
  • Understanding heat flux distortion is crucial for predicting fluid behavior.
  • Plate dynamics in fluid systems can offer insights into geological processes.

Purpose of the Study:

  • To investigate the motion of a free-floating plate in a Benard convection cell.
  • To explore the relationship between heat flux, induced flow, and plate movement.
  • To determine the factors influencing the plate's oscillatory behavior.

Main Methods:

  • Introducing a partially covering free-floating plate into an open-surface Benard convection cell.
  • Observing and analyzing the induced coherent flow and plate motion.

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  • Varying the coverage ratio and Rayleigh number to study their effects.

    • Main Results:

    • The plate was driven to a periodic motion, even in turbulent fluid conditions.
    • The oscillation period was found to be dependent on the coverage ratio.
    • The Rayleigh number of the convective system also influenced the plate's oscillatory behavior.

    Conclusions:

    • A free-floating plate can exhibit self-induced periodic motion in a Benard convection system.
    • The experimental findings may serve as a model for quasiperiodic continental drift.
    • This study highlights the interplay between heat flux, fluid flow, and object dynamics.