PHASE-FIELD MODELS OF GRAVITY-DRIVEN UNSATURATED FLOW IN POROUS MEDIA

被引：0
|
作者：
Cueto-Felgueroso, Luis [1 ]
Juanes, Ruben [1 ]
机构：
[1] MIT, Dept Civil & Environm Engn, Cambridge, MA 02139 USA
来源：
IMECE 2008: MECHANICS OF SOLIDS, STRUCTURES AND FLUIDS, VOL 12 | 2009年
关键词：
DYNAMIC CAPILLARY-PRESSURE; WETTING FRONT INSTABILITY; INVASION PERCOLATION; VISCOUS LIQUID; DISPLACEMENTS; DIMENSIONS; EXTENSION; EQUATION; PHYSICS; SOILS;
D O I：
暂无
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Existing continuum models of multiphase flow in pot-oils media arc, unable to explain why preferential flow (fingering) occurs during infiltration into homogeneous, dry soil. We identify a relevant pattern-forming, mechanism in the dynamics of the wetting front, and present a macroscopic model that reproduces the experimentally observed features of fingered flows. The proposed model reveals a scaling between local and nonlocal interface phenomena in imbibition, and does not introduce new independent parameters. The predictions based on this model are consistent with experiments and theories of scaling in porous media.
引用
收藏
页码：35 / 40
页数：6
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