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Influence of wetting behavior on the morphology of droplet impacts onto dry-patterned micro-structured surfaces

2022-12-12Journal article Open access
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dc.contributor.authorFoltyn, Patrick
dc.contributor.authorRibeiro, Daniela
dc.contributor.authorSilva, André
dc.contributor.authorLamanna, Grazia
dc.contributor.authorWeigand, Bernhard
dc.date.accessioned2022-12-15T09:50:41Z
dc.date.available2023-12-12T01:30:23Z
dc.date.issued2022-12-12
dc.description.abstractThe influence of surface roughness, especially regularly patterned micro-structures on the physical outcomes of droplet impacts, is far from fully understood. In order to get a deeper insight into the physics of the impact phenomena, a systematic experimental study of the morphology on regularly patterned micro-structured surfaces has been carried out. The used structures with different dimensions were grooves and pillars with a square cross section. With the help of plasma activation and plasma polymerization processes, the surface wettability was modified independently from the surface structure and material. Two different test fluids were used, namely, distilled water and isopropanol, impacting with various impact energies onto the patterned surface samples. For a better characterization of the impact process, high-speed images from three different perspectives have been acquired synchronously. Due to the transparent surface material, the bottom perspective using a total internal reflection configuration was able to visualize air entrapment inside the surface structure. To the authors' knowledge, such images are not available in the literature, yet. The outcomes have been qualitatively investigated, summarized, and compared. A dependency of the outcomes on the impact energy, the surface wettability, and the structure dimensions could be clearly shown. In general, increasing impact energy will promote the tendency of splashing. However, roughness features cannot only trigger splashing, but can also inhibit it, for example, crown splashing. Moreover, reproducible arrangements of air entrapment inside the structure could be found, which was addressed by the authors as “cookie” and “button” due to their appearance.pt_PT
dc.description.sponsorshipThe authors kindly acknowledge the financial support of this work by the Deutsche Forschungsgemeinschaft (DFG) in the frame of the International Research Training Group “Droplet Interaction Technologies” (GRK 2160: DROPIT) under the Project No. 270852890. Additionally, the authors would like to acknowledge the support of Fundação para a Ciência e a Tecnologia (FCT) through the Ph.D. Scholarship No. SFRH/BD/140009/2018 and the Project No. UIDB/50022/2020. The mold fabrication, the surface replication, and the SEM analysis were carried out with the support of the Karlsruhe Nano Micro Facility (KNMF Proposal No. 2016-017-016369, www.knmf.kit.edu) and a Helmholtz Research Infrastructure at Karlsruhe Institute of Technology (KIT, www.kit.edu).pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationP. Foltyn, D. Ribeiro, A. Silva, G. Lamanna, and B. Weigand, "Influence of wetting behavior on the morphology of droplet impacts onto dry-patterned micro-structured surfaces", Physics of Fluids 34(12), 123322 (2022)pt_PT
dc.identifier.doi10.1063/5.0124692pt_PT
dc.identifier.eissn1089-7666
dc.identifier.issn1070-6631
dc.identifier.urihttp://hdl.handle.net/10400.6/12534
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherAIP Publishingpt_PT
dc.relationNovo: nsights into Droplet-Surface Collisions for Aeronautical Applications. Inicial: Modelling of Droplets-Wall Impingement: Jet Fuel and Biofuel Mixtures
dc.relationAssociate Laboratory of Energy, Transports and Aeronautics
dc.relation.publisherversionhttps://aip.scitation.org/doi/10.1063/5.0124692pt_PT
dc.subjectThin filmspt_PT
dc.subjectImage processingpt_PT
dc.subjectHydrophobic interactionspt_PT
dc.subjectHydrophilic interactionspt_PT
dc.subjectSurface collisionspt_PT
dc.subjectPlasma processingpt_PT
dc.subjectImpact parameterpt_PT
dc.subjectMultiphase flowspt_PT
dc.subjectFluid dropspt_PT
dc.subjectK factorpt_PT
dc.titleInfluence of wetting behavior on the morphology of droplet impacts onto dry-patterned micro-structured surfacespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleNovo: nsights into Droplet-Surface Collisions for Aeronautical Applications. Inicial: Modelling of Droplets-Wall Impingement: Jet Fuel and Biofuel Mixtures
oaire.awardTitleAssociate Laboratory of Energy, Transports and Aeronautics
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/POR_CENTRO/SFRH%2FBD%2F140009%2F2018/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50022%2F2020/PT
oaire.citation.issue12pt_PT
oaire.citation.startPage123322pt_PT
oaire.citation.titlePhysics of Fluidspt_PT
oaire.citation.volume34pt_PT
oaire.fundingStreamPOR_CENTRO
oaire.fundingStream6817 - DCRRNI ID
person.familyNameFoltyn
person.familyNameRibeiro
person.familyNameResende Rodrigues da Silva
person.familyNameLamanna
person.familyNameWeigand
person.givenNamePatrick
person.givenNameDaniela
person.givenNameAndré
person.givenNameGrazia
person.givenNameBernhard
person.identifierJ-4185-2012
person.identifier.ciencia-id8219-4B2B-E1C7
person.identifier.orcid0000-0002-6921-5216
person.identifier.orcid0000-0001-5059-5303
person.identifier.orcid0000-0002-4901-7140
person.identifier.orcid0000-0002-1725-9663
person.identifier.orcid0000-0002-1469-079X
person.identifier.ridB-2997-2013
person.identifier.scopus-author-id57192071511
person.identifier.scopus-author-id11440407500
person.identifier.scopus-author-id15832103400
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
rcaap.embargofctO artigo foi publicado com "Published under an exclusive license by AIP Publishing."pt_PT
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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