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 Experiment Videos

Chaos suppression in gas-solid fluidization.

Deborah V. Pence1, Donald E. Beasley

  • 1University of Rhode Island, Department of Mechanical Engineering, 92 Upper College Road, Kingston, Rhode Island 02881.

Chaos (Woodbury, N.Y.)
|June 5, 2003
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

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

Sort by
Same journal

Multiscale dynamics of special memristive ion channels in a neural circuit.

Chaos (Woodbury, N.Y.)·2026
Same journal

Symmetry-protected delay spectroscopy in oscillator networks.

Chaos (Woodbury, N.Y.)·2026
Same journal

Mesoscale community organization governs epidemic onset and spread in metapopulations.

Chaos (Woodbury, N.Y.)·2026
Same journal

Topological dependence of viral mutation spread in complex host-interaction networks.

Chaos (Woodbury, N.Y.)·2026
Same journal

Multifractal signatures of Hamiltonian chaos in Hyperion's rotational dynamics.

Chaos (Woodbury, N.Y.)·2026
Same journal

Exploring mechanisms for reversal of flow in tunicate hearts.

Chaos (Woodbury, N.Y.)·2026
See all related articles

Chaotic behavior in gas-solid fluidization can be suppressed by introducing an opposing oscillatory flow. This study demonstrates significant chaos suppression in bubbling fluidized beds using specific flow rates and a 15 Hz oscillation frequency.

Area of Science:

  • Fluidization dynamics
  • Nonlinear systems analysis
  • Chaos theory in granular materials

Background:

  • Fluidization involves a balance between gravity and fluid flow forces.
  • Density differences can lead to instabilities and bubble formation in the bubbling regime.
  • Gas-solid fluidized beds exhibit self-excited nonlinear system behavior.

Purpose of the Study:

  • To investigate the suppression of chaos in gas-solid fluidization.
  • To examine the effect of an opposing oscillatory flow on chaotic behavior.
  • To analyze pressure dynamics in a bubbling fluidized bed under secondary flow conditions.

Main Methods:

  • Acquisition of time series data for local, instantaneous pressure.
  • Experimental setup in a horizontal cylinder submerged in a bubbling fluidized bed.

Related Experiment Videos

  • Analysis of pressure signals using Kolmogorov entropy estimates.

    • Main Results:

    • Deterministic chaos was observed in the absence of secondary flow.
    • An opposing oscillatory flow substantially suppressed chaotic behavior.
    • Phase-locking phenomenon observed coincident with the imposed frequency.
    • Greatest suppression occurred at low primary/secondary flow rates and 15 Hz oscillation frequency.

    Conclusions:

    • Opposing oscillatory flow is an effective method for chaos suppression in gas-solid fluidization.
    • The phenomenon is dependent on flow rates and oscillation frequency.
    • Findings contribute to understanding and controlling nonlinear dynamics in fluidized beds.