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dc.contributor.authorBaumgarten, Aaron S
dc.contributor.authorKamrin, Kenneth N
dc.date.accessioned2021-03-11T22:17:33Z
dc.date.available2021-03-11T22:17:33Z
dc.date.issued2018-12
dc.date.submitted2018-09
dc.identifier.issn1469-7645
dc.identifier.urihttps://hdl.handle.net/1721.1/130128
dc.description.abstractWe present a thermodynamically consistent constitutive model for fluid-saturated sediments, spanning dense to dilute regimes, developed from the basic balance laws for two-phase mixtures. The model can represent various limiting cases, such as pure fluid and dry grains. It is formulated to capture a number of key behaviours such as: (i) viscous inertial rheology of submerged wet grains under steady shearing flows, (ii) the critical state behaviour of grains, which causes granular Reynolds dilation/contraction due to shear, (iii) the change in the effective viscosity of the fluid due to the presence of suspended grains and (iv) the Darcy-like drag interaction observed in both dense and dilute mixtures, which gives rise to complex fluid-grain interactions under dilation and flow. The full constitutive model is combined with the basic equations of motion for each mixture phase and implemented in the material point method (MPM) to accurately model the coupled dynamics of the mixed system. Qualitative results show the breadth of problems which this model can address. Quantitative results demonstrate the accuracy of this model as compared with analytical limits and experimental observations of fluid and grain behaviours in inhomogeneous geometries. ©2018 Cambridge University Press.en_US
dc.description.sponsorshipArmy Research Office (W911NF-16-1-0440)en_US
dc.description.sponsorshipNSF (CBET-1253228)en_US
dc.language.isoen
dc.publisherCambridge University Press (CUP)en_US
dc.relation.isversionofhttps://dx.doi.org/10.1017/JFM.2018.914en_US
dc.rightsCreative Commons Attribution-Noncommercial-Share Alikeen_US
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/4.0/en_US
dc.sourcearXiven_US
dc.titleA general fluid–sediment mixture model and constitutive theory validated in many flow regimesen_US
dc.typeArticleen_US
dc.identifier.citationBaumgarten, Aaron S. and Ken Kamrin, "A general fluid–sediment mixture model and constitutive theory validated in many flow regimes." Journal of Fluid Mechanics 861 (February 2019): 721-64 ©2018 Authorsen_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Aeronautics and Astronauticsen_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Mechanical Engineeringen_US
dc.relation.journalJournal of Fluid Mechanicsen_US
dc.eprint.versionOriginal manuscripten_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/NonPeerRevieweden_US
dc.date.updated2020-07-21T18:11:21Z
dspace.date.submission2020-07-21T18:11:23Z
mit.journal.volume861en_US
mit.licenseOPEN_ACCESS_POLICY


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