Berlin 2015 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 4: Granular Matter / Contact Dynamics Part I

DY 4.1: Vortrag

Montag, 16. März 2015, 09:30–09:45, BH-N 128

Vertically vibrated granular gas with van der Waals interactions — •Qiong Bai, James P. D. Clewett, Stephan Herminghaus, and Marco G. Mazza — Max Planck Institute for Dynamics and Self-Organization, Am Fassberg 17, 37077 Goettingen, Germany

Although a lot of research has focused on granular matter, as a non-equilibrium system granular matter is still a field full of unexplored static and dynamic phenomena. An important system is granular gases with macroscopic van der Waals interactions, which play a critical role in the generation process of asteroids.

Here, we study with MD simulation a vertically vibrated, 3D granular gas with van der Waals interactions between grains. As the driving amplitude and filling fraction vary, the system shows three main regimes: homogeneous, solid-gas coexistence and clustered. Moreover, when the system is in a solid-gas coexistence state, we find crystalline clusters inside the solid plug and the cluster size dramatically changes with the driving amplitude and filling fraction.