The non-homogeneous flow of a thixotropic fluid around a sphere
DC Field | Value | Language |
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dc.contributor.author | Kim, Jaekwang | - |
dc.contributor.author | Park, Jun Dong | - |
dc.date.available | 2021-02-22T05:23:44Z | - |
dc.date.issued | 2020-06 | - |
dc.identifier.issn | 0307-904X | - |
dc.identifier.issn | 1872-8480 | - |
dc.identifier.uri | https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/1374 | - |
dc.description.abstract | The non-homogeneous flow of a thixotropic fluid around a settling sphere is simulated. A four-parameter Moore model is used for a generic thixotropic fluid and discontinuous Galerkin method is employed to solve the structure-kinetics equation coupled with the conservation equations of mass and momentum. Depending on the normalized falling velocity U*, which compares the time scale of structure formation and destruction, flow solutions are divided into three different regimes, which are attributed to an interplay of three competing factors: Brownian structure recovery, shear-induced structure breakdown, and the convection of microstructures. At small U*( << 1), where the Brownian structure recovery is predominant, the thixotropic effect is negligible and flow solutions are not too dissimilar to that of a Newtonian fluid. As U* increases, a remarkable structural gradient is observed and the structure profile around the settling sphere is determined by the balance of all three competing factors. For large enough U*( >> 1), where the Brownian structure recovery becomes negligible, the balance between shear-induced structure breakdown and the convection plays a decisive role in determining flow profile. To quantify the interplay of three factors, the drag coefficient Cs of the sphere is investigated for ranges of U*. With this framework, the effect of the destruction parameter, the confinement ratio, and a possible nonlinearity in the model-form on the non-homogeneous flow of a thixotropy fluid have been addressed. (C) 2020 Elsevier Inc. All rights reserved. | - |
dc.format.extent | 19 | - |
dc.language | 영어 | - |
dc.language.iso | ENG | - |
dc.publisher | ELSEVIER SCIENCE INC | - |
dc.title | The non-homogeneous flow of a thixotropic fluid around a sphere | - |
dc.type | Article | - |
dc.publisher.location | 미국 | - |
dc.identifier.doi | 10.1016/j.apm.2020.02.009 | - |
dc.identifier.scopusid | 2-s2.0-85080057263 | - |
dc.identifier.wosid | 000527324800043 | - |
dc.identifier.bibliographicCitation | APPLIED MATHEMATICAL MODELLING, v.82, pp 848 - 866 | - |
dc.citation.title | APPLIED MATHEMATICAL MODELLING | - |
dc.citation.volume | 82 | - |
dc.citation.startPage | 848 | - |
dc.citation.endPage | 866 | - |
dc.type.docType | Article | - |
dc.description.isOpenAccess | N | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Engineering | - |
dc.relation.journalResearchArea | Mathematics | - |
dc.relation.journalResearchArea | Mechanics | - |
dc.relation.journalWebOfScienceCategory | Engineering, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Mathematics, Interdisciplinary Applications | - |
dc.relation.journalWebOfScienceCategory | Mechanics | - |
dc.subject.keywordPlus | YIELD-STRESS | - |
dc.subject.keywordPlus | NUMERICAL-SIMULATION | - |
dc.subject.keywordPlus | CONSTITUTIVE MODEL | - |
dc.subject.keywordPlus | CREEPING MOTION | - |
dc.subject.keywordPlus | RHEOLOGY | - |
dc.subject.keywordPlus | SYSTEMS | - |
dc.subject.keywordPlus | VISCOELASTICITY | - |
dc.subject.keywordPlus | VERIFICATION | - |
dc.subject.keywordPlus | VISCOSITY | - |
dc.subject.keywordPlus | BEHAVIOR | - |
dc.subject.keywordAuthor | Thixotropy | - |
dc.subject.keywordAuthor | Flow around a sphere | - |
dc.subject.keywordAuthor | Structure-kinetics model | - |
dc.subject.keywordAuthor | non-homogenous flow | - |
dc.identifier.url | https://www.sciencedirect.com/science/article/abs/pii/S0307904X20300949?via%3Dihub | - |
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