A lattice Boltzmann model with random dynamical constraints
软凝聚态物质
2009-11-10 v1 统计力学
摘要
In this paper we introduce a modified lattice Boltzmann model (LBM) with the capability of mimicking a fluid system with dynamic heterogeneities. The physical system is modeled as a one-dimensional fluid, interacting with finite-lifetime moving obstacles. Fluid motion is described by a lattice Boltzmann equation and obstacles are randomly distributed semi-permeable barriers which constrain the motion of the fluid particles. After a lifetime delay, obstacles move to new random positions. It is found that the non-linearly coupled dynamics of the fluid and obstacles produces heterogeneous patterns in fluid density and non-exponential relaxation of two-time autocorrelation function.
关键词
引用
@article{arxiv.cond-mat/0405214,
title = {A lattice Boltzmann model with random dynamical constraints},
author = {A. Lamura and S. Succi},
journal= {arXiv preprint arXiv:cond-mat/0405214},
year = {2009}
}
备注
10 pages, 9 figures, to be published in Eur. Phys. J. B