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Collision-enhanced friction of a bouncing ball on a rough vibrating surface
N D Smith1, M R Swift1, M I Smith2
1School of Physics and Astronomy, University of Nottingham, Nottingham, NG7 2RD, UK.
Scientific Reports
|January 12, 2021
Summary
Friction significantly increases near boundaries for a bouncing ball on a rough, vibrating surface. This enhanced dissipation impacts particle behavior and correlations, showing friction is key to collision dynamics.
Area of Science:
- Physics
- Dynamics
- Friction
Background:
- Understanding particle dynamics on vibrating surfaces is crucial in various scientific fields.
- Previous studies often simplify surface interactions, neglecting complex frictional effects.
Purpose of the Study:
- To investigate the dynamics of a ball bouncing on a rough vibrating surface.
- To quantify the frictional impulse and its impact on particle behavior.
Main Methods:
- Experiments involving a bouncing ball on a rough vibrating surface.
- Simulations to model the system's dynamics.
- Direct measurement of impulse during each bounce.
Main Results:
- Frictional interaction is strongly enhanced near the side wall.
- Enhanced dissipation arises from coupled collision, rotation, and surface friction.
- Dissipation can be up to three times larger than inelastic collision losses.
Conclusions:
- Effective particle collision properties are interdependent with surface frictional properties.
- Enhanced dissipation near boundaries influences particle density and spatial correlations.
- The study highlights the importance of considering complex frictional interactions in dynamic systems.
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