| Issue |
EPJ Web Conf.
Volume 249, 2021
Powders & Grains 2021 – 9th International Conference on Micromechanics on Granular Media
|
|
|---|---|---|
| Article Number | 14004 | |
| Number of page(s) | 4 | |
| Section | Particle Simulations and Particle-Based Methods | |
| DOI | https://doi.org/10.1051/epjconf/202124914004 | |
| Published online | 07 June 2021 | |
https://doi.org/10.1051/epjconf/202124914004
Non-equilibrium response and slow equilibration in hard disk systems
Graduate School of Engineering, Nagoya Institute of Technology, 466-8555, Japan.
* e-mail: cmm12069@ict.nitech.ac.jp
** e-mail: isobe@nitech.ac.jp
Published online: 7 June 2021
The relaxation from a non-equilibrium state to the equilibrium depends on the methodologies and initial conditions. To investigate the microscopic mechanisms of equilibration systematically, we focus on the non-equilibrium response during the equilibration process induced by a disturbance of the homogeneous expansion of the simple hard disk systems. Large scale simulations by event-driven molecular dynamics revealed that an anomalous slow equilibration toward the liquid states emerges when starting from the co-existence phase. The origin of the slow decay mechanism is investigated using the probability distribution of local density and orientational order parameter.Their inhomogeneities seem to cause the anomalous slow equilibration.
A video is available at https://doi.org/10.48448/hmf9-1939
© The Authors, published by EDP Sciences, 2021
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