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Effect of different filling protocols in granular matter thermodynamic properties.
##manager.scheduler.building##: Edificio Santa Maria
##manager.scheduler.room##: Auditorio San Agustin
Date: 2019-07-10 12:00 PM – 03:45 PM
Last modified: 2019-06-14
Abstract
Paula A gago (1); Marcos Madrid (2)
(1) Department of Earth Science and Engineering, Imperial College London, SW7 2BP, UK.
(2) Dpto. de Ing. Mecánica, Facultad Regional La Plata, Universidad Tecnológica Nacional, CONICET, Argentina.
In the statistic mechanical description of static granular matter, the system packing fraction is a fundamental property [1-5]. Nevertheless, to create an homogeneous granular sample in real systems does not result simple [5-6].
In a resemblance with glasses, the way in which granular energy is dissipated in granular systems to reach a static configuration strongly affects the system density. This dissipation is usually driven by gravity, introducing a preferential direction into the system. Moreover, as the dissipation occurs between particle-particle and particle-wall interactions, it creates different stresses states for the system.
In this work we study different pouring protocols for the filling of a rigid container with granular material. We analyse the effect that these protocols have in the system density and stress distribution using numerical simulation of soft dissipative spheres with a discrete element method model.
[1] Edwards, Sam F., and R. B. S. Oakeshott. "Theory of powders." Physica A: Statistical Mechanics and its Applications 157.3 (1989): 1080-1090.
[2] Edwards, S. F. (2005). The full canonical ensemble of a granular system. Physica A: Statistical Mechanics and its Applications, 353(0), 114-118.
[3] Nowak, E. R., et al. "Reversibility and irreversibility in the packing of vibrated granular material." Powder technology 94.1 (1997): 79-83.
[4] Pugnaloni, L. A., Sánchez, I., Gago, P. A., Damas, J., Zuriguel, I., & Maza, D. (2010). Towards a relevant set of state variables to describe static granular packings. Physical Review E, 82(5), 050301.
[5] Gago, P. A., Maza, D., & Pugnaloni, L. A. (2015). Relevance of system size to the steady-state properties of tapped granular systems. Physical Review E, 91(3), 032207.
[6] Knight, J. B., Fandrich, C. G., Lau, C. N., Jaeger, H. M., & Nagel, S. R. (1995). Density relaxation in a vibrated granular material. Physical review E, 51(5), 3957.
(1) Department of Earth Science and Engineering, Imperial College London, SW7 2BP, UK.
(2) Dpto. de Ing. Mecánica, Facultad Regional La Plata, Universidad Tecnológica Nacional, CONICET, Argentina.
In the statistic mechanical description of static granular matter, the system packing fraction is a fundamental property [1-5]. Nevertheless, to create an homogeneous granular sample in real systems does not result simple [5-6].
In a resemblance with glasses, the way in which granular energy is dissipated in granular systems to reach a static configuration strongly affects the system density. This dissipation is usually driven by gravity, introducing a preferential direction into the system. Moreover, as the dissipation occurs between particle-particle and particle-wall interactions, it creates different stresses states for the system.
In this work we study different pouring protocols for the filling of a rigid container with granular material. We analyse the effect that these protocols have in the system density and stress distribution using numerical simulation of soft dissipative spheres with a discrete element method model.
[1] Edwards, Sam F., and R. B. S. Oakeshott. "Theory of powders." Physica A: Statistical Mechanics and its Applications 157.3 (1989): 1080-1090.
[2] Edwards, S. F. (2005). The full canonical ensemble of a granular system. Physica A: Statistical Mechanics and its Applications, 353(0), 114-118.
[3] Nowak, E. R., et al. "Reversibility and irreversibility in the packing of vibrated granular material." Powder technology 94.1 (1997): 79-83.
[4] Pugnaloni, L. A., Sánchez, I., Gago, P. A., Damas, J., Zuriguel, I., & Maza, D. (2010). Towards a relevant set of state variables to describe static granular packings. Physical Review E, 82(5), 050301.
[5] Gago, P. A., Maza, D., & Pugnaloni, L. A. (2015). Relevance of system size to the steady-state properties of tapped granular systems. Physical Review E, 91(3), 032207.
[6] Knight, J. B., Fandrich, C. G., Lau, C. N., Jaeger, H. M., & Nagel, S. R. (1995). Density relaxation in a vibrated granular material. Physical review E, 51(5), 3957.