Abstract
If we pour spherical beads in a container and then gently shake it to increase the compaction of the system, the packing fraction will converge logarithmically to 0.64, the density of a random close packing. If the system is specially sheared, or tapped through an annealing procedure, lattices may self-organize. In this work we study granular crystallization induced by magnetic cohesion. We observe an interesting granular polymorphism probably due to an effective van der Waals-like interaction.
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Carvente, O., Peraza-Mues, G.G., Salazar, J.M. et al. Self-assembling of non-Brownian magnetized spheres. Granular Matter 14, 303–308 (2012). https://doi.org/10.1007/s10035-012-0333-4
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DOI: https://doi.org/10.1007/s10035-012-0333-4