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Hydrodynamics of thermal granular convection.

作者信息

He Xiaoyi, Meerson Baruch, Doolen Gary

机构信息

Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.

出版信息

Phys Rev E Stat Nonlin Soft Matter Phys. 2002 Mar;65(3 Pt 1):030301. doi: 10.1103/PhysRevE.65.030301. Epub 2002 Feb 12.

DOI:10.1103/PhysRevE.65.030301
PMID:11909014
Abstract

A hydrodynamic theory is formulated for buoyancy-driven ("thermal") granular convection, recently predicted in molecular dynamic simulations and observed in experiment. The limit of a dilute flow is considered. The problem is fully described by three scaled parameters. The convection occurs via a supercritical bifurcation, the inelasticity of the collisions being the control parameter. The character of hydrodynamic modes of the system is discussed. The theory is expected to be valid for small Knudsen numbers and nearly elastic grain collisions.

摘要

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