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

DY: Fachverband Dynamik und Statistische Physik

DY 25: Granular Matter / Contact Dynamics

DY 25.8: Vortrag

Mittwoch, 3. April 2019, 11:45–12:00, H3

Structural similarity between dry and wet sphere packings — •Matthias Schröter^1,2, Simon Weis³, and Gerd Schröder-Turk^{3, 4, 5} — ¹Institute for Multiscale Simulation, Friedrich-Alexander-Universität Erlangen-Nürnberg — ²Max Planck Institute for Dynamics and Self-Organization, Göttingen — ³Institut für Theoretische Physik I, Friedrich-Alexander-Universität Erlangen-Nürnberg — ⁴Maths & Stats, School of Engineering and Information Technology, Murdoch University, Perth, Australia — ⁵Applied Maths, Research School of Physical Sciences & Engin., Australian National Univ., Canberra, Australia

The mechanical properties of granular materials change significantly in the presence of a wetting liquid which creates capillary bridges between the particles. Here we demonstrate, using X-ray tomographies of dry and wet sphere packings, that this change in mechanical properties is not accompanyied by structural differences between the packings. We characterize the latter by the average numbers of contacts of each sphere ⟨ Z⟩ and the shape isotropy ⟨ β₀^2,0 ⟩ of the Voronoi cells of the particles. Additionally, we show that the number of liquid bridges per sphere ⟨ B⟩ is approximately equal to ⟨ Z⟩ + 2, independent of the volume fraction of the packing. These findings will be helpful in guiding the development of both particle-based models and continuum mechanical descriptions of wet granular matter.