Two-phase flow in correlated pore-throat random porous media

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	Two-phase flow in correlated pore-throat random porous media
	J. P. Tian; K. L. Yao
	2002
发表期刊	Chinese Physics
ISSN	1009-1963
卷号	11 期号:4 页码:358-365
摘要	We have constructed a porous media model in which there are percolation clusters with varying percolation probability P and correlated site-bonds. Taking into account both the pore and the throat geometry, the viscous fingering (VF) in porous media has been investigated by using the standard over-relaxed Gauss-Seidel scheme. The simulation results show that the VF structure varies with the correlation parameter epsilon, the viscosity ratio M and the percolation probability P. The smaller the correlation parameter e, the greater the deviation of the normalized size distribution of the invaded throat N-inv(r) from the truncated Rayleigh distribution. For a larger viscosity ratio M, the VF pattern looks like a diffusion-limited-aggregation structure in percolation clusters. The fractal dimension D increases with the increase of the percolation probability P and the correlation parameter epsilon. The velocity distribution f (alpha) of VF in percolation clusters is of a parabola-like curve. The tail of the distribution (large alpha) is longer for a larger correlation parameter epsilon. For a smaller epsilon, the distribution is very sharp. The sweep efficiency E decreases along with the decrease of the correlation parameter e and the increase of the network size L-nz. E has a minimum as L increases up to the maximum no matter what the values of P, M and epsilon. The E similar to L-nz curve has a frozen zone and an active zone. The geometry and the topology of the porous media have strong effects on the displacement processes and the structure of VF.
部门归属	wuhan inst sci & technol, dept phys, wuhan 430073, peoples r china. huazhong univ sci & technol, dept phys, wuhan 430074, peoples r china. ccast, world lab, beijing 100080, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110015, peoples r china.;tian, jp (reprint author), wuhan inst sci & technol, dept phys, wuhan 430073, peoples r china
关键词	Correlation Parameter Fractal Dimension Sweep Efficiency Scaling Function Diffusion-limited-aggregation Viscous Fingers Percolation Displacement Simulations Growth Ratio
URL	查看原文
WOS记录号	WOS:000175330700009
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/36422
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. P. Tian,K. L. Yao. Two-phase flow in correlated pore-throat random porous media[J]. Chinese Physics,2002,11(4):358-365.
APA	J. P. Tian,&K. L. Yao.(2002).Two-phase flow in correlated pore-throat random porous media.Chinese Physics,11(4),358-365.
MLA	J. P. Tian,et al."Two-phase flow in correlated pore-throat random porous media".Chinese Physics 11.4(2002):358-365.