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Updated: Jun 26, 2026

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
Published on: December 4, 2017
Short-pulse dynamics in strongly nonlinear dissipative granular chains
Alexandre Rosas1, Aldo H Romero, Vitali F Nesterenko
1Departamento de Física, Universidade Federal da Paraíba, João Pessoa, Caixa Postal 5008-CEP 58.059-970, Paraíba, Brazil.
Abstract:
We study the energy decay properties of a pulse propagating in a strongly nonlinear granular chain with damping proportional to the relative velocity of the grains. We observe a wave disturbance that at low viscosities consists of two parts exhibiting two entirely different time scales of dissipation. One part is an attenuating solitary wave, dominated by discreteness and nonlinearity effects as in a dissipationless chain, and has the shorter lifetime. The other is a purely dissipative shocklike structure with a much longer lifetime and exists only in the presence of dissipation. The range of viscosities and initial configurations that lead to this complex wave disturbance are explored.
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