Energy decay in a granular gas collapse

Language
en
Document Type
Article
Issue Date
2017-03-21
Issue Year
2017
Authors
Almazán, Lidia
Serero, Dan
Salueña, Clara
Pöschel, Thorsten
Editor
Abstract

An inelastic hard ball bouncing repeatedly off the ground comes to rest in finite time by performing an infinite number of collisions. Similarly, a granular gas under the influence of external gravity, condenses at the bottom of the confinement due to inelastic collisions. By means of hydrodynamical simulations, we find that the condensation process of a granular gas reveals a similar dynamics as the bouncing ball. Our result is in agreement with both experiments and particle simulations, but disagrees with earlier simplified hydrodynamical description. Analyzing the result in detail, we find that the adequate modeling of pressure plays a key role in continuum modeling of granular matter.

Journal Title
New Journal of Physics
Volume
19
Issue
1
Citation
New Journal of Physics 19.1 (2017). <http://iopscience.iop.org/article/10.1088/1367-2630/aa5598>
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