Disordered packings of binary mixtures of dimer particles

Abstract Disordered packings of non-spherical particles and their mixtures are abundant in nature, but have so far attracted only few systematic studies. Previous investigations binary specific convex shapes established two generic properties: (i) the existence a unique density maximum when shape or mixture composition species varied; (ii) validity an ideal mixing law indicating that packing is independent segregation state. These findings were observed for such as spherocylinders, ellipsoids, spheres. Here, we investigate properties frictionless dimer simulated by gravitational pouring protocol LAMMPS. Our results demonstrate (i, ii) also non-convex particles. Moreover, contact statistics these to elucidate microstructural features underlie ii). show number per satisfies simple similar microscopic rearrangements contacts monodisperse accompany formation peak largely composition.