Granular Dynamics

Dear Colleagues,

The study of granular matter has been of interest in recent years as a test ground for condensed matter but in systems with macroscopic scale particles. This is so because granular matter phenomenology displays important analogies with molecular systems but also strong peculiarities: hydrodynamics problems (such as laminar flow, convection, turbulence, etc.), phase transitions, jamming, memory effects, etc., also appear in granular matter but frequently with strong peculiarities and added complexity. In addition, granular systems, if properly thermalized, may also resemble active matter systems.

The properties of granular dynamics, like in molecular matter, are very different depending on the ranges of particle density present in the system of interest. For low densities, particle interactions may be described exclusively through instant binary collisions. However, at higher densities, significant regions with particles at rest may be found, and hence, the appropriate theoretical tools are very different. In practice, most real granular matter systems may present both low-density and high-density regimes, which makes the problem more involved.

This is why theoretical analysis must be complemented with experiments and computational work.

The following issue is devoted to recent advances in the comprehension of granular dynamics, in relation to all of these questions.

Dr. Francisco Vega Reyes
Guest Editor

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• granular dynamics
• hydrodynamics
• active matter
• complex fluids
• phase transitions
• memory effects
• convection
• jamming
• clogging