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Criterion for bubble encapsulation on drop impact onto a liquid film

2023-02-14Artigo científico Acesso aberto
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dc.contributor.authorRibeiro, Daniela
dc.contributor.authorSilva, A. R. R.
dc.contributor.authorPanão, Miguel
dc.date.accessioned2023-03-27T08:24:46Z
dc.date.available2025-03-06T01:30:19Z
dc.date.issued2023-02-14
dc.description.abstractThe phenomenon of bubble encapsulation results from droplet impact on a liquid film for specific impact conditions, but there is no established criterion for predicting its onset. Phenomenon visualization from two perspectives, the common lateral perspective and a bottom perspective, provided insights into the dynamics and formation mechanisms. Namely, the bottom shadowgraphs show capillary wavy patterns and perturbations imposed on the steady liquid film, which suggests a greater role of the liquid film in the onset of bubble encapsulation. Also, some considerations about the cavity development underneath the bubble limited by the solid wall allow concluding that the cavity shape is independent of the bubble encapsulation phenomenon. Additionally, using the bottom shadowgraphs, the crown closure time shows a systematic decrease in the dimensionless film thickness of 0.5<𝛿𝑓<0.6, which will be subject of future work. Finally, while most drop impact correlations focus on using the droplets' characteristics and thermophysical properties, the experimental results point in a different direction. Considering correlations relating the Ohnesorge and Reynolds numbers, the new criterion for the onset of bubble encapsulation uses drop characteristics and properties in the Reynolds number, while the liquid film thickness and thermophysical properties are used in the Ohnesorge number because most of the crown material comes from the liquid film. Therefore, the criterion based on 100% occurrence of bubble encapsulation is not a threshold, but a range: 𝑘𝑏𝑒=𝑙𝑛(34.5/𝑅𝑒𝐷)/𝑙𝑛(𝑂ℎ𝑓) , with 𝑘𝑏𝑒∈[1.022,1.142]. Other authors observed this phenomenon and despite being outside the validation range of this correlation, the values are close to their boundaries.pt_PT
dc.description.sponsorshipFundação para a Ciência e a Tecnologiapt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationD. Ribeiro, A. R. R. Silva, M. R. O. Panão, "Criterion for bubble encapsulation on drop impact onto a liquid film", Phys. Fluids 35, 033305 (2023), 10.1063/5.0138901pt_PT
dc.identifier.doi10.1063/5.0138901pt_PT
dc.identifier.issn1070-6631
dc.identifier.issn1089-7666
dc.identifier.urihttp://hdl.handle.net/10400.6/13283
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherAIP Publishingpt_PT
dc.relationAssociate Laboratory of Energy, Transports and Aeronautics [UIDB/50022/2020]
dc.relationAssociate Laboratory of Energy, Transports and Aeronautics UIDP/50022/2020
dc.relationBolsa de Doutoramento FCT - Insights into Droplet-Surface Collisions for Aeronautical Applications [SFRH/BD/140009/2018]
dc.relation.publisherversionhttps://aip.scitation.org/doi/full/10.1063/5.0138901pt_PT
dc.subjectFluid dynamicspt_PT
dc.subjectCapillary wavespt_PT
dc.subjectThin filmspt_PT
dc.subjectBiofuelspt_PT
dc.subjectImage processingpt_PT
dc.subjectHydrodynamicspt_PT
dc.subjectFluid bubblespt_PT
dc.subjectMultiphase flowspt_PT
dc.subjectDropspt_PT
dc.subjectThermodynamic propertiespt_PT
dc.subjectFilm thicknesspt_PT
dc.subjectReynolds numberpt_PT
dc.subjectCavity developmentpt_PT
dc.subjectDynamic mechanismpt_PT
dc.subjectWavy perturbationspt_PT
dc.subjectWavy patternpt_PT
dc.subjectFormation mechanismpt_PT
dc.titleCriterion for bubble encapsulation on drop impact onto a liquid filmpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardNumberUIDB/50022/2020
oaire.awardNumberUIDP/50022/2020
oaire.awardNumberSFRH/BD/140009/2018
oaire.awardTitleAssociate Laboratory of Energy, Transports and Aeronautics [UIDB/50022/2020]
oaire.awardTitleAssociate Laboratory of Energy, Transports and Aeronautics UIDP/50022/2020
oaire.awardTitleBolsa de Doutoramento FCT - Insights into Droplet-Surface Collisions for Aeronautical Applications [SFRH/BD/140009/2018]
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50022%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F50022%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/POR_CENTRO/SFRH%2FBD%2F140009%2F2018/PT
oaire.citation.issue3pt_PT
oaire.citation.startPage033305pt_PT
oaire.citation.titlePhysics of Fluidspt_PT
oaire.citation.volume35pt_PT
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStreamPOR_CENTRO
person.familyNameRibeiro
person.familyNameSilva
person.familyNamePanão
person.givenNameDaniela
person.givenNameAndré Resende Rodrigues da
person.givenNameMiguel Rosa Oliveira
person.identifierJ-4185-2012
person.identifiertnDRoxYAAAAJ
person.identifier.ciencia-id8219-4B2B-E1C7
person.identifier.ciencia-id181F-16AE-4536
person.identifier.orcid0000-0001-5059-5303
person.identifier.orcid0000-0002-4901-7140
person.identifier.orcid0000-0001-9561-9268
person.identifier.scopus-author-id11440407500
person.identifier.scopus-author-id8900941900
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.embargofctOs direitos foram cedidos à editora por 24 meses.pt_PT
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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