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Velocity dependent coefficient of restitution and the evolution of collisional systems

✍ Scribed by H. Salo; J. Lukkari; J. Hänninen

Book ID
104624747
Publisher
Springer Netherlands
Year
1988
Tongue
English
Weight
711 KB
Volume
43
Category
Article
ISSN
1573-0794

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✦ Synopsis

Numerical simulations of 250 mutually colliding particles, revolving in the gravitational field of a central body, indicate that velocity dependent coefficient of restitution, CI = a(v), can lead to a many particle thick equilibrium state, independent of the initial conditions. The essential requirement for this to take place is that dcljdv < 0, in agreement with theoretical predktions. In the case dajdu > 0, the system either disperses through growing random velocities, or flattens to a near monolayer state, depending on the initial conditions.

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Simulations of dense granular gases with
Simulations of dense granular gases without gravity with impact-velocity-dependent restitution coefficient
✍ Sean McNamara; Eric Falcon 📂 Article 📅 2008 🏛 Elsevier Science 🌐 English ⚖ 729 KB

We report two-dimensional simulations of strongly vibrated granular materials without gravity. The coefficient of restitution depends on the impact velocity between particles by taking into account both the viscoelastic and plastic deformations of particles, occurring at low and high velocities resp