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Flow-induced motions of flexible filaments hanging in cross-flow

2018-04-27Journal article Open access
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dc.contributor.authorSilva-Leon, Jorge
dc.contributor.authorCioncolini, Andrea
dc.contributor.authorFilippone, Antonio
dc.contributor.authorDomingos, Marco
dc.date.accessioned2023-05-31T13:40:30Z
dc.date.available2023-05-31T13:40:30Z
dc.date.issued2018-04-27
dc.description.abstractExperiments were carried out to study the dynamics of hanging cantilever flexible filaments in air cross-flow. Thirteen flexible filaments of 0.61 mm diameter and lengths from 20 mm to 60 mm were tested with wind speeds in the range of 1–15 m/s, corresponding to Reynolds numbers of 25 < Red < 610 and reduced velocities in the range of 5 < U∗ < 130. Two synchronized fast-imaging cameras were used to reconstruct the motion of the filaments in three dimensions, and a blend of linear and nonlinear time-series analysis techniques was used to analyze the observed dynamics. Long filaments show a rich dynamics as the wind speed is gradually increased, ranging from small amplitude vibration to large amplitude limit-cycle oscillation and to a more complex chaotic motion. However, short filaments only exhibit a small amplitude vibration-like motion throughout the range of wind speeds tested. Turbulent buffeting is identified as the main source of excitation responsible for the observed filaments dynamics. The results highlight the importance of the filament damping ratio, which is modulated by the filament length, as a controlling parameter for the dynamics of flexible filaments in cross flow, in addition to the flow velocity. The Scruton number for these tests correspond to 31 < Sc < 86.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationJorge Silva-Leon, Andrea Cioncolini, Antonio Filippone, Marco Domingos, Flow-induced motions of flexible filaments hanging in cross-flow, Experimental Thermal and Fluid Science, Volume 97, 2018, Pages 254-269, ISSN 0894-1777, https://doi.org/10.1016/j.expthermflusci.2018.04.023pt_PT
dc.identifier.doi10.1016/j.expthermflusci.2018.04.023pt_PT
dc.identifier.issn1879-2286
dc.identifier.urihttp://hdl.handle.net/10400.8/8548
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/pii/S0894177718307805pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/pt_PT
dc.subjectLimit-cycle oscillationpt_PT
dc.subjectTurbulence buffetingpt_PT
dc.subjectTurbulence-induced vibrationpt_PT
dc.subjectFilamentpt_PT
dc.subjectFlexible fluid–structure interactionpt_PT
dc.titleFlow-induced motions of flexible filaments hanging in cross-flowpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage269pt_PT
oaire.citation.startPage254pt_PT
oaire.citation.titleExperimental Thermal and Fluid Sciencept_PT
oaire.citation.volume97pt_PT
person.familyNameDomingos
person.givenNameMarco
person.identifier.ciencia-idB512-2D06-5897
person.identifier.orcid0000-0002-6693-790X
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication1fb3bd4b-f499-4db6-93c1-3a671f116d07
relation.isAuthorOfPublication.latestForDiscovery1fb3bd4b-f499-4db6-93c1-3a671f116d07

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