Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/349898
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dc.contributor.CRUESPUNIVERSIDADE ESTADUAL DE CAMPINASpt_BR
dc.contributor.authorunicampGontijo, Rafael Gabler-
dc.typeArtigopt_BR
dc.titleDynamic numerical simulations of magnetically interacting suspensions in creeping flowpt_BR
dc.contributor.authorGontijo, R.G.-
dc.contributor.authorCunha, F.R.-
dc.subjectMagnetizaçãopt_BR
dc.subjectSimulaçãopt_BR
dc.subject.otherlanguageMagnetizationpt_BR
dc.subject.otherlanguageSimulationpt_BR
dc.description.abstractThe equations governing the motion of N magnetic particles suspended in a viscous fluid at low Reynolds and finite Stokes numbers are solved by direct numerical simulations for different Péclet numbers. The Langevin dynamics simulations include all dipole–dipole magnetic interactions for force and torque. An external applied magnetic field and near field interactions represented by contact and repulsion forces are also considered. Repulsive forces are modeled using a variation of the screened-Coulomb type potential. The initial particle distribution is an ergodic ensemble in which each member consists of N mutually impenetrable spheres whose centers are randomly distributed in a prismatic cell of volume V with wall boundaries. The stability of the proposed numerical method and its convergence in calculating some relevant macroscopic properties of the magnetic suspension are carefully examined. The simulations are used to investigate structure transition from an isotropic random distribution of particles to other structures in the presence of an external magnetic field and magnetic particle–particle interactions. The simulations show dimmers and short chain formation in the suspension space at low volume fraction. When the volume fraction is increased long chains and thin anisotropic structures may be observed along the magnetic field direction. The numerical method is also used to calculate the steady state equilibrium magnetization, and accurate results are obtained for different particle volume fractions ϕ in agreement with asymptotic theories. The method presented is able to consider up to 3000 particles with accuracy and computational efficiency. Typical configurations and particle trajectories are also shown and discussed from a physical point of viewpt_BR
dc.relation.ispartofPowder technologypt_BR
dc.relation.ispartofabbreviationPowder technol.pt_BR
dc.publisher.cityAmsterdampt_BR
dc.publisher.countryPaíses Baixospt_BR
dc.publisherElsevierpt_BR
dc.date.issued2015-
dc.date.monthofcirculationJulypt_BR
dc.language.isoengpt_BR
dc.description.volume279pt_BR
dc.description.firstpage146pt_BR
dc.description.lastpage165pt_BR
dc.rightsFechadopt_BR
dc.sourceWOSpt_BR
dc.identifier.issn0032-5910pt_BR
dc.identifier.eissn1873-328Xpt_BR
dc.identifier.doi10.1016/j.powtec.2015.03.033pt_BR
dc.identifier.urlhttps://www.sciencedirect.com/science/article/pii/S0032591015002375pt_BR
dc.description.sponsorshipCONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQpt_BR
dc.description.sponsorshipCOORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPESpt_BR
dc.description.sponsordocumentnumberNão tempt_BR
dc.description.sponsordocumentnumberNão tempt_BR
dc.date.available2020-09-24T19:21:10Z-
dc.date.accessioned2020-09-24T19:21:10Z-
dc.description.provenanceSubmitted by Susilene Barbosa da Silva (susilene@unicamp.br) on 2020-09-24T19:21:10Z No. of bitstreams: 0. Added 1 bitstream(s) on 2021-01-07T20:40:01Z : No. of bitstreams: 1 000356123400018.pdf: 5073807 bytes, checksum: 6061832fa8f775bf00bffa6580727c45 (MD5) Bitstreams deleted on 2021-01-08T14:10:27Z: 000356123400018.pdf,. Added 1 bitstream(s) on 2021-01-08T14:13:43Z : No. of bitstreams: 1 000356123400018.pdf: 5073807 bytes, checksum: 6061832fa8f775bf00bffa6580727c45 (MD5) Bitstreams deleted on 2021-01-13T13:27:17Z: 000356123400018.pdf,. Added 1 bitstream(s) on 2021-01-13T13:29:39Z : No. of bitstreams: 1 000356123400018.pdf: 5073807 bytes, checksum: 6061832fa8f775bf00bffa6580727c45 (MD5)en
dc.description.provenanceMade available in DSpace on 2020-09-24T19:21:10Z (GMT). No. of bitstreams: 0 Previous issue date: 2015en
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/349898-
dc.contributor.departmentDepartamento de Energiapt_BR
dc.contributor.unidadeFaculdade de Engenharia Mecânicapt_BR
dc.subject.keywordMagnetic suspensionspt_BR
dc.subject.keywordSedimentationpt_BR
dc.subject.keywordParticle interactionspt_BR
dc.subject.keywordNumerical simulationpt_BR
dc.identifier.source000356123400018pt_BR
dc.creator.orcid0000-0002-8610-7903pt_BR
dc.type.formArtigopt_BR
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