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dc.contributor.authorLiu, YF
dc.contributor.authorJeng, D-S
dc.date.accessioned2019-07-05T12:33:28Z
dc.date.available2019-07-05T12:33:28Z
dc.date.issued2019
dc.identifier.issn0309-1708
dc.identifier.doi10.1016/j.advwatres.2019.05.024
dc.identifier.urihttp://hdl.handle.net/10072/385795
dc.description.abstractThe permeability of a saturated porous medium is an important parameter in the field of water resources and geotechnical engineering. The geometric characteristics of a porous medium are key factors in the prediction of its permeability. In this paper, particles of different shapes are constructed by Cellular Automata (CA) random growth model, and particles with different surface characteristics are constructed by the spherical harmonic function. Then, porous media of different porosities, shapes, surface features, and particle size distributions are generated on the basis of the constructed particles. Three-dimensional Lattice Boltzmann Method is used for the pore-scale simulation of the seepage flow in a porous medium. The numerical results show that the effects of the particle shape and surface characteristics on the permeability are too obvious to be ignored. Using strict univariate analysis, the sensitivity of the various factors to the permeability, ordered from large to small, is as follows: porosity > particle size distribution > particle surface > particle shape. Based on numerical studies, a modified Kozeny–Carman (KC) formula is proposed by considering all the geometrical factors. All the parameters (the Wadell sphericity Sw, Cox roundness Rc, coefficient of non-uniformity Cu, the curve coefficient of curvature Cc, and effective particle size d10) in it are easily obtained in engineering practice and the accuracy of the formula is verified. Although It has been proven that the KC formula is applicable to multi-dispersed spherical particles and non-spherical particles whose surfaces are not very rough, its applicability to rough particles is limited. The modified KC formula does not have this limitation; therefore, it has a wider scope of application than the conventional KC formula.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherElsevier Science
dc.relation.ispartofpagefrom232
dc.relation.ispartofpageto249
dc.relation.ispartofjournalAdvances in Water Resources
dc.relation.ispartofvolume129
dc.subject.fieldofresearchApplied mathematics
dc.subject.fieldofresearchCivil engineering
dc.subject.fieldofresearchEnvironmental engineering
dc.subject.fieldofresearchcode4901
dc.subject.fieldofresearchcode4005
dc.subject.fieldofresearchcode4011
dc.titlePore scale study of the influence of particle geometry on soil permeability
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
dcterms.licensehttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.description.versionAccepted Manuscript (AM)
gro.rights.copyright© 2019 Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence (http://creativecommons.org/licenses/by-nc-nd/4.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.
gro.hasfulltextFull Text
gro.griffith.authorJeng, Dong-Sheng


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