CRITICAL PHENOMENA IN FLUID INVASION OF POROUS-MEDIA

被引:162
作者
MARTYS, N
CIEPLAK, M
ROBBINS, MO
机构
[1] POLISH ACAD SCI,INST PHYS,PL-02668 WARSAW,POLAND
[2] JOHNS HOPKINS UNIV,DEPT PHYS & ASTRON,BALTIMORE,MD 21218
关键词
D O I
10.1103/PhysRevLett.66.1058
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We present a phase diagram for fluid invasion of porous media as a function of pressure P and the contact angle theta of the invading fluid. Increasing P leads to percolation above a critical theta-c, and depinning below theta-c. Depinning is characterized by a diverging coherence length and the power-law distribution of events typical of self-organized critical phenomena. At the transition from percolation to depinning another correlation length diverges and an order parameter, an effective macroscopic surface tension, becomes nonzero. The fluid interface changes from self-similar to self-affine. Results are compared to experiments.
引用
收藏
页码:1058 / 1061
页数:4
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