Getting hotter by heating less: How driven granular materials dissipate energy in excess
A. Plati,
L. de Arcangelis,
A. Gnoli
et al.
Abstract:We investigate how the kinetic energy acquired by a dense granular system driven by an external vibration depends on the input energy. Our focus is on the dependence of the granular behavior on two main parameters: frequency and vibration amplitude. We find that there exists an optimal forcing frequency, at which the system reaches the maximal kinetic energy: if the input energy is increased beyond such a threshold, the system dissipates more and more energy and recovers a colder and more viscous state. Quite … Show more
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