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SUPPLEMENTARY FIGURES Supplementary Figure S1. Experimental setup. (a) Schematic view of the experimental system. (b) The packing fraction (ϕ) is independent of the depth, with a constant value of 0.811 ± 0.149 calculated over a rectangular cell of 12 cm × 12 cm. (c) Angle of repose of the particles in 2D obtained after emptying the material through an(More)
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