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Polar granular rods in a vibrating container. Above a critical vibrational excitation, the rods aggregate at the boundary (left) while further increase in the excitation reverses this effect and results in a nearly uniform distribution (right). |
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Polar granular rods in a vibrating container. Above a critical vibrational excitation, the rods aggregate at the boundary (left) while further increase in the excitation reverses this effect and results in a nearly uniform distribution (right). |