Related Experiment Video
Updated: Jul 19, 2026
11:03
An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
Published on: December 4, 2017
Experimental characterization of vibrated granular rings
Z A Daya1, E Ben-Naim, R E Ecke
1Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
The European Physical Journal. E, Soft Matter
|October 13, 2006
Summary
This study explores the statistical physics of vibrated granular rings, revealing how bead collisions and chain structure influence ring dynamics and properties. Findings offer insights into granular materials and complex system behavior.
Area of Science:
- Statistical physics
- Granular materials science
- Complex systems dynamics
Background:
- Granular materials exhibit complex behaviors influenced by particle interactions and external forces.
- Understanding vibrated granular systems is crucial for applications ranging from industrial processes to geophysical phenomena.
Purpose of the Study:
- To experimentally investigate the statistical properties of vibrated granular rings.
- To analyze how inelastic collisions and physical constraints affect ring configurations and dynamics.
Main Methods:
- An experimental setup using a vertically oscillating plate to excite a metallic ring chain (rods and beads).
- High-resolution imaging to capture numerous ring configurations for statistical analysis.
- Measurement of local (inter-bead separation, bond angles) and global (radius of gyration, center-of-mass motion) properties.
Main Results:
- Characterization of ensemble averages and distributions for various physical properties of the granular rings.
- Analysis of how scaling laws relate to the size of the metallic chain.
- Identification of key dynamic drivers: inelastic bead-plate collisions and ring connectedness.
Conclusions:
- The study provides a quantitative understanding of the statistical mechanics governing vibrated granular rings.
- Results highlight the interplay between collisional energy input and structural constraints in dictating system behavior.
- The findings contribute to the broader knowledge of disordered and complex granular systems.
More Related Videos
Related Concept Videos
01:19Vibrating Concrete
Mechanical vibrators are instrumental in compacting newly poured concrete within formwork and around reinforcements. This process is essential to eliminate trapped air pockets and establish a dense concrete mass. One widely used method is vibrating by internal vibrators, often referred to as a poker vibrator or immersion vibrator. It is rapidly inserted through the full depth of the freshly laid concrete and slightly extends into the layer below it (which remains in a plastic state). Consistent...
01:07Gravitational Potential Energy for Extended Objects
Consider a system comprising several point masses. The coordinates of the center of mass for this system can be expressed as the summation of the product of each mass and its position vector divided by the total mass:
01:28Frictional Forces on Flat Belts
Flat belts are commonly used in various industrial applications for transmitting power from one pulley to another. When a flat belt is wrapped around a set of pulleys, it experiences different tensions at the driving pulley ends due to the friction between the belt and pulley surface. When the pulley moves in a counterclockwise direction, the tension T2 on the opposite side of the pulley where the belt is moving away from is higher than the tension T1 on the side where the belt is moving...
01:09Torsional Pendulum
A torsional pendulum involves the oscillation of a rigid body in which the restoring force is provided by the torsion in the string from which the rigid body is suspended. Ideally, the string should be massless; practically, its mass is much smaller than the rigid body's mass and is neglected.
As long as the rigid body's angular displacement is small, its oscillation can be modeled as a linear angular oscillation. The amplitude of the oscillation is an angle. The role of mass is played by the...
As long as the rigid body's angular displacement is small, its oscillation can be modeled as a linear angular oscillation. The amplitude of the oscillation is an angle. The role of mass is played by the...
01:18Stress Concentrations in Circular Shafts
Consider the elastic torsion formula, which applies to a circular shaft with a consistent cross-section. This formula assumes that the shaft's ends are loaded with rigid plates firmly attached. However, in many cases, torques are applied to the shaft through mechanisms like flange couplings or gears, which are connected by keys inserted into keyways. This application method modifies the stress distribution near the point of torque application, causing it to deviate from the distributions...
01:13Circular Shaft - Stresses in Linear Range
Consider a scenario where a circular shaft is subject to torque that remains within the boundaries of Hooke's Law, avoiding any permanent deformation. So, the formula for shearing strain is revisited. This formula is multiplied by the modulus of rigidity, and then Hooke's Law for the shearing stress and strain is applied. As a result, the equation for shearing stress in a shaft can be derived.