Related Experiment Video
Updated: Sep 25, 2025

Magnetically Induced Rotating Rayleigh-Taylor Instability
Published on: March 3, 2017
A Rayleigh-Bénard convection instability analog in vibrated gas-fluidized granular particles
Qiang Guo1, Yuxuan Zhang1, Thomas M Kovar1
1Department of Chemical Engineering, Columbia University, USA. cmb2302@columbia.edu.
Abstract:
Granular particles subject to both vertical gas flow and vertical vibration are shown experimentally to exhibit structured convection cells in a densely packed yet fluidized state without gas voids traveling through the particles. Continuum gas-granular simulations reproduce the phenomenon and demonstrate that the convection occurs due to buoyant force arising from a positive vertical gradient in bulk solid density competing with viscous force created by interparticle friction. Simulations further show that convection structures persist in a controllable manner when increasing system width.
More Related Videos
11:03An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
Published on: December 4, 2017
11:51Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions
Published on: February 22, 2018
Related Concept Videos
Couette Flow
Steady, Laminar Flow Between Parallel Plates
Irrotational Flow
Steady, Laminar Flow in Circular Tubes
Laminar and Turbulent Flow
Accelerating Fluids
The motion of the liquid within this infinitesimal cylinder is considered to obtain the pressure difference. Three vertical forces act on this liquid: