A Lattice Boltzmann model for studying transient effects during imbibition-drainage cycles in unsaturated soils

Galindo-Torres, S. A., Scheuermann, A., Li, L., Pedroso, D. M. and Williams, D. J. (2013) A Lattice Boltzmann model for studying transient effects during imbibition-drainage cycles in unsaturated soils. Computer Physics Communications, 184 4: 1086-1093. doi:10.1016/j.cpc.2012.11.015


Author Galindo-Torres, S. A.
Scheuermann, A.
Li, L.
Pedroso, D. M.
Williams, D. J.
Title A Lattice Boltzmann model for studying transient effects during imbibition-drainage cycles in unsaturated soils
Journal name Computer Physics Communications   Check publisher's open access policy
ISSN 0010-4655
1879-2944
Publication date 2013-04-01
Year available 2012
Sub-type Article (original research)
DOI 10.1016/j.cpc.2012.11.015
Open Access Status
Volume 184
Issue 4
Start page 1086
End page 1093
Total pages 8
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Language eng
Abstract This paper presents a numerical model based on the Lattice Boltzmann Method (LBM), developed for studying dynamic responses of an unsaturated porous medium to periodic imbibition and drainage induced by a cyclic water table movement. The model includes gravity which helps defining an hydraulic head. The model predicted an incremental increase of the overall water content in the medium over each cycle prior to a quasi-steady oscillatory state, a hydraulic ratcheting effect that has been previously observed in laboratory experiments. An empirical model was proposed to combine the transient and harmonic variations of the volumetric water content. The parameters of this empirical model were examined against physical quantities including the frequency of the driving water table oscillations and the porosity of the porous medium. The findings presented here may help to improve the formulation of constitutive models that are able to describe hydraulic processes of unsaturated soils.
Keyword Lattice Boltzmann methods
Unsaturated soil physics
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online: 12 December 2012.

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
Official 2014 Collection
 
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