Numerical Simulation of Unstable Preferential Flow during Water Infiltration into Heterogeneous Dry Soil
نویسندگان
چکیده
منابع مشابه
Sensitivity Analysis and Validation for Numerical Simulation of Water Infiltration into Unsaturated Soil
A FORTRAN code for liquid water flow in unsaturated soil under the isothermal condition was developed to simulate water infiltration into Yolo light clay. The governing equation, that is, Richards' equation, was approximated by the finite-difference method. A normalized sensitivity coefficient was used in the sensitivity analysis of Richards' equation. Normalized sensitivity coefficient was cal...
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The sorptivity S quantifies the effect of capillarity on liquid movement in a porous material. For liquid infiltration into an initially dry material, S is a parameter that is contingent on both liquid and material properties as well as the maximum liquid content behind the infiltrating front, hm. Scaling analyses are used to derive a dimensionless, intrinsic sorptivity S* that is constant for ...
متن کاملIntrinsic Sorptivity and Water Infiltration into Dry Soil at Different Degrees of Saturation
The sorptivity S quantifies the effect of capillarity on liquid movement in a porous material. For liquid infiltration into an initially dry material, S is a parameter that is contingent on both liquid and material properties as well as the maximum liquid content behind the infiltrating front, θm. In prior work, Culligan et al. (2005) used scaling analyses to derive a dimensionless, intrinsic s...
متن کاملThree-dimensional simulation of unstable gravity-driven infiltration of water into a porous medium
10 Infiltration of water in dry porous media is subject to a powerful gravity-driven instability. Although the phenomenon of unstable infiltration is well known, its description using continuum mathematical models has posed a significant challenge for several decades. The classical model of water flow in the unsaturated flow, the Richards equation, is unable to reproduce the instability. Here, ...
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ژورنال
عنوان ژورنال: Water
سال: 2020
ISSN: 2073-4441
DOI: 10.3390/w12030909