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The impact of temperature on heated liquid films: Crater and jetting impact dynamics

2023-05-12Journal article Open access
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dc.contributor.authorVasconcelos, Daniel
dc.contributor.authorSilva, A. R. R.
dc.contributor.authorBarata, Jorge M M
dc.date.accessioned2023-05-22T08:18:17Z
dc.date.available2023-05-22T08:18:17Z
dc.date.issued2023-05-12
dc.description.abstractThe droplet impact phenomena onto liquid films are a field extensively researched for over a century, which are driven by many practical applications such as heat exchangers, internal combustion engines and spray cooling. Despite the extensive work on wetted surfaces, the influence of temperature on droplet outcome, local evaporation/boiling effects, and liquid film stability has been overlooked in the literature. Therefore, the main objective of this work is to evaluate the influence of the liquid film temperature on the crater and jet dynamics. The experimental setup was designed for this purpose, in which a borosilicate glass surface that contains the liquid film is placed over an aluminium block with embedded cartridge heaters, heating it by conduction. Water, n-decane and n-heptane are the fluids adopted for the experiments due to their differences in thermophysical properties and saturation temperature. Different conditions are considered, which include two dimensionless thicknesses, h*= 1.0 and h*=1.5, and a range of dimensionless temperatures, theta = 0, theta = 0.2, theta = 0.4 and theta = 0.6. Qualitative and quantitative analyses are performed regarding crater evolution, and central jet height and breakup measurements, respectively. Evaporation rate measurements are required due to the influence on the liquid film thickness variation. Qualitative results show that temperature differences promote the formation of recirculation zones near the impact surface and the crater boundaries, as well as the influence on the crater shape and curvature. In terms of the quantitative analysis, the central jet height measurements for the n-heptane and n-decane reveal that higher values of the dimensionless temperature lead to an increase in the jet height, as well as promoting and increasing the occurrence and number of secondary droplets, respectively. Water follows a similar trend with the exception of theta = 0.2, which can be explained by a time scale analysis.pt_PT
dc.description.sponsorshipFundação para a Ciência e a Tecnologiapt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.expthermflusci.2023.110944pt_PT
dc.identifier.issn0894-1777
dc.identifier.issn1879-2286
dc.identifier.urihttp://hdl.handle.net/10400.6/13342
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationAssociate Laboratory of Energy, Transports and Aeronautics
dc.relationAssociate Laboratory of Energy, Transports and Aeronautics
dc.relationDroplet Impact onto Heated Wetted Surfaces: A Fundamental Study
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/pii/S0894177723001000?via%3Dihubpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectDroplet impactpt_PT
dc.subjectHeated liquid filmpt_PT
dc.subjectEvaporationpt_PT
dc.subjectTime scalespt_PT
dc.subjectCentral jet breakuppt_PT
dc.titleThe impact of temperature on heated liquid films: Crater and jetting impact dynamicspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleAssociate Laboratory of Energy, Transports and Aeronautics
oaire.awardTitleAssociate Laboratory of Energy, Transports and Aeronautics
oaire.awardTitleDroplet Impact onto Heated Wetted Surfaces: A Fundamental Study
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//SFRH%2FBD%2F143307%2F2019/PT
oaire.citation.startPage110944pt_PT
oaire.citation.titleExperimental Thermal and Fluid Sciencept_PT
oaire.citation.volume147pt_PT
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
person.familyNameRodrigues
person.familyNameResende Rodrigues da Silva
person.familyNameMartins Barata
person.givenNameDaniel de Almeida Vasconcelos
person.givenNameAndré
person.givenNameJorge Manuel
person.identifierJ-4185-2012
person.identifierhFY_5JYAAAAJ&hl
person.identifier.ciencia-id2A1A-1CBC-9E37
person.identifier.ciencia-id8219-4B2B-E1C7
person.identifier.ciencia-idF611-BBCC-DAA8
person.identifier.orcid0000-0003-0918-6879
person.identifier.orcid0000-0002-4901-7140
person.identifier.orcid0000-0001-9014-5008
person.identifier.scopus-author-id11440407500
person.identifier.scopus-author-id11439470600
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.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication43054ee7-4db6-44bd-a87c-b9e3f461d4e5
relation.isAuthorOfPublication908e150d-3890-457c-b5da-09c84671cb93
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relation.isAuthorOfPublication.latestForDiscovery43054ee7-4db6-44bd-a87c-b9e3f461d4e5
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