Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/349890
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dc.contributor.CRUESPUNIVERSIDADE ESTADUAL DE CAMPINASpt_BR
dc.contributor.authorunicampGontijo, Rafael Gabler-
dc.typeArtigopt_BR
dc.titleLaminar pipe flow with drag reduction induced by a magnetic field gradientpt_BR
dc.contributor.authorRosa, A.P.-
dc.contributor.authorGontijo, R.G.-
dc.contributor.authorCunha, F.R.-
dc.subjectFluídos magnéticospt_BR
dc.subjectMagnetizaçãopt_BR
dc.subjectViscosidadept_BR
dc.subject.otherlanguageMagnetic fluidspt_BR
dc.subject.otherlanguageMagnetizationpt_BR
dc.subject.otherlanguageViscositypt_BR
dc.description.abstractThis work presents analytic and numerical results for a unidirectional flow in a circular capillary of a magnetic fluid. A condition that deviates from the standard equation of equilibrium magnetization due to the vorticity of the flow is considered. We show that the model of a magnetic symmetrical fluid with no-coupling between magnetization and flow leads to velocity profiles very close to the parabolic one. This scenario may change drastically when the fluid magnetization is coupled with the flow vorticity resulting in a nonlinear relation between pressure gradient and flow volume rate and consequently a non-Newtonian behavior. The solutions are developed with the fluid undergoing each a pressure gradient and an applied magnetic field gradient. The dimensionless governing equations reveal an important physical parameter denoted magnetic Reynolds number, which measures the relative importance between hydrodynamic and magnetic forces. The resulting equation is solved numerically and by a regular perturbation method. Explicit expressions for the dimensionless velocity profile, effective viscosity and friction factor as function of the dimensionless magnetic and hydrodynamic physical parameters are presented. Numerical and analytic results are compared and a good agreement is verified for the range where the analytic solution can be used. The studies are applied to explore the emerging propose of drag reducing fluids by applying a magnetic field gradient favorable to the flow direction. We have observed that the application of a controllable magnetic field gradient may be responsible for a meaningful drag reduction in a laminar pipe flowpt_BR
dc.relation.ispartofApplied mathematical modellingpt_BR
dc.relation.ispartofabbreviationAppl. math. model.pt_BR
dc.publisher.cityNew York, NYpt_BR
dc.publisher.countryEstados Unidospt_BR
dc.publisherElsevierpt_BR
dc.date.issued2016-
dc.date.monthofcirculationMar.pt_BR
dc.language.isoengpt_BR
dc.description.volume40pt_BR
dc.description.issuenumber5-6pt_BR
dc.description.firstpage3907pt_BR
dc.description.lastpage3918pt_BR
dc.rightsFechadopt_BR
dc.sourceWOSpt_BR
dc.identifier.issn0307-904Xpt_BR
dc.identifier.eissn1872-8480pt_BR
dc.identifier.doi10.1016/j.apm.2015.10.050pt_BR
dc.identifier.urlhttps://www.sciencedirect.com/science/article/pii/S0307904X15007143pt_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.sponsordocumentnumber441340/2014-8pt_BR
dc.description.sponsordocumentnumber402371/2013-5pt_BR
dc.date.available2020-09-24T18:44:37Z-
dc.date.accessioned2020-09-24T18:44:37Z-
dc.description.provenanceSubmitted by Susilene Barbosa da Silva (susilene@unicamp.br) on 2020-09-24T18:44:37Z No. of bitstreams: 0. Added 1 bitstream(s) on 2021-01-07T20:40:00Z : No. of bitstreams: 1 000371839700031.pdf: 1385453 bytes, checksum: 541d54a8563ee8d7d9b175837a26400a (MD5) Bitstreams deleted on 2021-01-08T14:10:26Z: 000371839700031.pdf,. Added 1 bitstream(s) on 2021-01-08T14:13:42Z : No. of bitstreams: 1 000371839700031.pdf: 1385453 bytes, checksum: 541d54a8563ee8d7d9b175837a26400a (MD5) Bitstreams deleted on 2021-01-13T13:27:16Z: 000371839700031.pdf,. Added 1 bitstream(s) on 2021-01-13T13:29:38Z : No. of bitstreams: 1 000371839700031.pdf: 1385453 bytes, checksum: 541d54a8563ee8d7d9b175837a26400a (MD5)en
dc.description.provenanceMade available in DSpace on 2020-09-24T18:44:37Z (GMT). No. of bitstreams: 0 Previous issue date: 2016en
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/349890-
dc.contributor.departmentDepartamento de Energiapt_BR
dc.contributor.unidadeFaculdade de Engenharia Mecânicapt_BR
dc.subject.keywordCapillary flowpt_BR
dc.subject.keywordDrag reductionpt_BR
dc.identifier.source000371839700031pt_BR
dc.creator.orcid0000-0002-8610-7903pt_BR
dc.type.formArtigopt_BR
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