Fluid flow through porous media: The role of stagnant zones

被引:93
作者
Andrade, JS
Almeida, MP
Mendes, J
Havlin, S
Suki, B
Stanley, HE
机构
[1] BOSTON UNIV, CTR POLYMER STUDIES, BOSTON, MA 02215 USA
[2] BOSTON UNIV, DEPT PHYS, BOSTON, MA 02215 USA
[3] BAR ILAN UNIV, MINERVA CTR, RAMAT GAN, ISRAEL
[4] BAR ILAN UNIV, DEPT PHYS, RAMAT GAN, ISRAEL
[5] BOSTON UNIV, DEPT BIOMED ENGN, BOSTON, MA 02215 USA
关键词
D O I
10.1103/PhysRevLett.79.3901
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We investigate fluid flow through disordered porous media by direct simulation of the Navier-Stokes equations in a two-dimensional percolation structure. We find, in contrast to the log-normal distribution for the local currents found in the analog-random resistor network, that over roughly 5 orders of magnitude the distribution n(E) of local kinetic energy E follows a power law, with n(E) proportional to E-alpha, where alpha = 0.90 +/- 0.03 for the entire cluster, while alpha = 0.64 +/- 0.05 for fluid flow in the backbone only. Thus the ''stagnant'' zones play a significant role in transport through porous media, in contrast to the dangling ends for the analogous electrical problem.
引用
收藏
页码:3901 / 3904
页数:4
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