Regensburg 2016 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

DY: Fachverband Dynamik und Statistische Physik

DY 3: Granular Matter

DY 3.5: Vortrag

Montag, 7. März 2016, 10:45–11:00, H46

Dynamical mesoscopic model for granular shear — •Sára Lévay and János Török — Department of Theoretical Physics, Budapest University of Technology and Economics, H-1111 Budapest, Hungary

Flow law of dense granular material is of fundamental importance and is still an unsolved problem. Different methods are competing in the literature with similar properties yet they fail to predict correctly all empirical results [1]. We introduce a improved version of a simple mesoscopic model [2] based on the principle of minimal dissipation and random local dynamic effects to reproduce both quasi-static and dynamic flow laws. We test our model against other theories and numerical simulations and show that in spite of its simplicity it can provide more precise results than other methods.

[1] Alexander Ries, Lothar Brendel, and Dietrich E. Wolf. "Shearrate diffusion and constitutive relations during transients in simple shear." Computational Particle Mechanics (2015): 1-8.

[2] Tamás Börzsönyi, Balázs Szabó, Gábor Törös, Sandra Wegner, János Török, Ellák Somfai, Tomasz Bien, and Ralf Stannarius "Orientational Order and Alignment of Elongated Particles Induced by Shear" Phys. Rev. Lett. 108, 228302 (2012).