Show simple item record

dc.contributor.authorZhou, MZ
dc.contributor.authorQi, WG
dc.contributor.authorJeng, DS
dc.contributor.authorGao, FP
dc.date.accessioned2021-09-23T23:48:41Z
dc.date.available2021-09-23T23:48:41Z
dc.date.issued2021
dc.identifier.issn0029-8018
dc.identifier.doi10.1016/j.oceaneng.2021.109807
dc.identifier.urihttp://hdl.handle.net/10072/408241
dc.description.abstractPrediction of wave-induced instantaneous (oscillatory or momentary) liquefaction is particularly important for the design of offshore foundations. Most previous studies applied the linear Darcy model to characterize the porous flow in a seabed. This treatment was found to cause fallacious tensile stresses in a non-cohesive seabed. In this study, to overcome such shortcomings of previous models, a non-Darcy flow model is proposed based on a Karush–Kuhn–Tucker (KKT) condition. In the KKT condition, the primal constraint arises from the fact that the tensile behavior does not exist in a non-cohesive seabed, while the dual condition arises from the physical evidences that the pore-fluid velocity increases during liquefaction. The non-linearity of the present model is handled by the Newton–Raphson method within the standard finite element framework, without coding constrained variational principle. This highlights the convenience for numerical implementation. The difficulties in treating the nonlinearity by previous dynamic permeability model are also eliminated by the non-Darcy flow model. The merits of the proposed model are validated by examining four numerical treatments and two liquefaction criteria. The liquefaction depth by the present model is found to be roughly 0.73 times of the value by the linear Darcy model.
dc.description.peerreviewedYes
dc.languageen
dc.publisherElsevier BV
dc.relation.ispartofpagefrom109807
dc.relation.ispartofjournalOcean Engineering
dc.relation.ispartofvolume239
dc.subject.fieldofresearchPhysical oceanography
dc.subject.fieldofresearchMarine engineering
dc.subject.fieldofresearchCivil engineering
dc.subject.fieldofresearchOceanography
dc.subject.fieldofresearchMaritime engineering
dc.subject.fieldofresearchcode370803
dc.subject.fieldofresearchcode401501
dc.subject.fieldofresearchcode4005
dc.subject.fieldofresearchcode3708
dc.subject.fieldofresearchcode4015
dc.titleA non-Darcy flow model for a non-cohesive seabed involving wave-induced instantaneous liquefaction
dc.typeJournal article
dc.type.descriptionC1 - Articles
dcterms.bibliographicCitationZhou, MZ; Qi, WG; Jeng, DS; Gao, FP, A non-Darcy flow model for a non-cohesive seabed involving wave-induced instantaneous liquefaction, Ocean Engineering, 2021, 239, pp. 109807
dcterms.licensehttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.date.updated2021-09-23T00:30:21Z
dc.description.versionAccepted Manuscript (AM)
gro.rights.copyright© 2021 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


Files in this item

This item appears in the following Collection(s)

  • Journal articles
    Contains articles published by Griffith authors in scholarly journals.

Show simple item record