5 papers
Self-organisation in hard-soft granular mixtures
Haoran Jiang, Dominik Krengel, Takashi Matsushima +1
Self-organisation of granular systems is a key determinant of their macroscopic behaviour and has been studied extensively in assemblies of hard particles. We use numerical simulat…
Random close packing fraction of bidisperse discs: theoretical derivation
Raphael Blumenfeld
Predicting theoretically the highest density, which a disordered packing of discs can achieve, has been a long-standing unresolved problem. Such predictions are hindered by two dif…
Self-organization, detailed balance, and stress-structure correlations in 2D granular dynamics
Raphael Blumenfeld, Takashi Matsushima, Jie Zhang
We argue that a number of recent experimental and numerical observations point to an ongoing cooperative stress-structure self-organisation (SO) in quasi-static granular dynamics.…
Effects of particle angularity on granular self-organization
Dominik Krengel, Haoran Jiang, Takashi Matsushima +1
Recent studies of two-dimensional poly-disperse disc systems revealed a coordinated self-organisation of cell stresses and shapes, with certain distributions collapsing onto a mast…
Comment on "Explicit Analytical Solution for Random Close Packing in d=2 and d=3", Physical Review Letters {\bf 128}, 028002 (2022)
Raphael Blumenfeld
The method, proposed in \cite{Za22} to derive the densest packing fraction of random disc and sphere packings, is shown to yield in two dimensions too high a value that (i) violate…