A solution to transient seepage in unsaturated porous media

Pedroso, Dorival M. (2015) A solution to transient seepage in unsaturated porous media. Computer Methods in Applied Mechanics and Engineering, 285 791-816. doi:10.1016/j.cma.2014.12.009

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Author Pedroso, Dorival M.
Title A solution to transient seepage in unsaturated porous media
Journal name Computer Methods in Applied Mechanics and Engineering   Check publisher's open access policy
ISSN 0045-7825
Publication date 2015-03-01
Year available 2014
Sub-type Article (original research)
DOI 10.1016/j.cma.2014.12.009
Open Access Status File (Author Post-print)
Volume 285
Start page 791
End page 816
Total pages 26
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Language eng
Subject 1706 Computer Science Applications
2206 Computational Mechanics
2211 Mechanics of Materials
2210 Mechanical Engineering
3100 Physics and Astronomy
Abstract This paper presents a solution to seepage problems in porous media considering the complete time-dependent transition from fully saturation to partially unsaturated states and vice-versa; therefore capturing the evolution of the free surface (region with zero liquid pressure). A simple and efficient method to implement the seepage face boundary condition for finite element solutions is proposed. The method is based on an analogy to unilateral constraints in Plasticity and, in essence, adds some extra unknowns to the finite elements with boundaries near the seepage face. The free surface is thus automatically predicted. The resulting enriched elements can also account for ponding or infiltration at the external surface. The solution is accomplished by considering the theory of porous media with slightly compressible liquids. The formulation can easily accommodate liquid retention models with hysteresis. Verification examples are presented in addition to simulations of drainage and infiltration illustrating the capabilities of the proposed solution.
Keyword Transient analysis
Unilateral boundary conditions
Free surface
Unsaturated soils
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID DE120100163
Institutional Status UQ
Additional Notes Published online ahead of print 12 Dec 2014

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
Official 2015 Collection
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Citation counts: TR Web of Science Citation Count  Cited 11 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 12 times in Scopus Article | Citations
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