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Updated: Apr 7, 2026
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An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
Published on: December 4, 2017
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Fluidization of a horizontally driven granular monolayer
Michael Heckel1, Achim Sack1, Jonathan E Kollmer1
1Institut für Multiskalensimulation, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.
Summary
Granular materials transition between condensed and gaseous states with horizontal vibrations. This transition, marked by hysteresis, is driven by particle collective motion energy.
Area of Science:
- Physics of granular materials
- Nonlinear dynamics
- Statistical mechanics
Background:
- Granular materials exhibit complex behaviors under external stimuli.
- Understanding phase transitions in granular systems is crucial for various applications.
Purpose of the Study:
- To investigate the transition of a granular monolayer between condensed and gaseous states.
- To analyze the influence of vibration parameters (amplitude, frequency) and particle density on this transition.
Main Methods:
- Experimental setup involving horizontally vibrated monodisperse granular monolayer.
- Characterization of the transition using measurable quantities: dissipation rate, sound emission, and gap size.
- Analysis of hysteresis and its relation to particle collective motion.
Main Results:
- Observed an abrupt dynamical state change during the transition.
- Identified distinct fingerprints in dissipation rate, sound emission, and sloshing motion.
- Demonstrated pronounced hysteresis in the transition behavior.
Conclusions:
- The transition is governed by the energy of collective particle motion relative to the container.
- Vibration parameters and particle density significantly influence the transition dynamics and hysteresis.
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