Diffusion of oriented particles in porous media

被引：3
|
作者：
Haber, Rene [1 ,2 ]
Prehl, Janett [1 ]
Herrmann, Heiko [2 ]
Hoffmann, Karl Heinz [1 ]
机构：
[1] Tech Univ Chemnitz, Inst Phys, D-09107 Chemnitz, Germany
[2] Tallinn Univ Technol, Inst Cybernet, Ctr Nonlinear Studies, EE-12618 Tallinn, Estonia
来源：
PHYSICS LETTERS A | 2013年 / 377卷 / 40期
关键词：
Anomalous diffusion; Random walks; Oriented random walks; Porous media; Sierpinski carpets; ANOMALOUS DIFFUSION; RANDOM-WALKS; SIERPINSKI CARPETS; LIQUID-CRYSTALS; SUBDIFFUSION; EQUATIONS; FRACTALS; ENTROPY; FLUIDS; CELLS;
D O I：
10.1016/j.physleta.2013.08.036
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Diffusion of particles in porous media often shows subdiffusive behavior. Here, we analyze the dynamics of particles exhibiting an orientation. The features we focus on are geometrical restrictions and the dynamical consequences of the interactions between the local surrounding structure and the particle orientation. This interaction can lead to particles getting temporarily stuck in parts of the structure. Modeling this interaction by a particular random walk dynamics on fractal structures we find that the random walk dimension is not affected while the diffusion constant shows a variety of interesting and surprising features. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：2840 / 2845
页数：6
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