Fluctuations in fluid invasion into disordered media
Fluctuations in fluid invasion into disordered media
复制标题
DOI：
10.1103/physrevlett.98.054502
复制
发表时间：
2007-02-02
影响因子：
8.6
通讯作者：
Alava, Mikko
中科院分区：
文献类型：
--
作者：
Rost, Martin;Laurson, Lasse;Alava, Mikko
在无序介质中运动的界面表现出随机的速度波动，服从与守恒律的存在或不存在有关的普适标度关系。对于多孔介质的流体入侵，我们表明，由流体守恒引起的几何形状依赖的长度尺度的速度的波动。这一结果相比，从一个非平衡（脱钉）之间的移动接口和一个固定的，固定的过渡的统计。
Interfaces moving in a disordered medium exhibit stochastic velocity fluctuations obeying universal scaling relations related to the presence or absence of conservation laws. For fluid invasion of porous media, we show that the fluctuations of the velocity are governed by a geometry-dependent length scale arising from fluid conservation. This result is compared to the statistics resulting from a nonequilibrium (depinning) transition between a moving interface and a stationary, pinned one.