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Origin of density clustering in a freely evolving granular gas

 

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Opened Access Origin of density clustering in a freely evolving granular gas
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Author: Brey Abalo, Javier
Cubero, David
Ruiz Montero, María José
Department: Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear
Universidad de Sevilla. Departamento de Física Aplicada I
Date: 1999
Published in: Physical Review E, 60(3), 3150-3157
Document type: Article
Abstract: The physical mechanisms leading to the development of density inhomogeneities in a freely evolving low density granular gas are investigated. By means of the direct simulation Monte Carlo method, numerical solutions of the inelastic Boltzmann equation are constructed for both a perturbed system and also for an initially homogeneous state. Analysis of the Fourier components of the fields indicates that the nonlinear coupling contributions of the transversal velocity play a crucial role in the initial setup of clustering. A simple hydrodynamic model is proposed to describe what is observed in the simulations. Finally, the nature of the inhomogeneous state is briefly discussed.
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URI: http://hdl.handle.net/11441/25436

DOI: 10.1103/PhysRevE.60.3150

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