Interplay of transport mechanisms during the evaporation of a pinned sessile water droplet

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buir.contributor.authorÇetin, Barbaros
buir.contributor.orcidÇetin, Barbaros|0000-0001-9824-4000
dc.citation.epage073605-14en_US
dc.citation.issueNumber073605en_US
dc.citation.spage073605-1en_US
dc.citation.volumeNumber6en_US
dc.contributor.authorAkdag, O.
dc.contributor.authorAkkus, Y.
dc.contributor.authorÇetin, Barbaros
dc.contributor.authorDursunkaya, Z.
dc.date.accessioned2022-02-15T06:02:32Z
dc.date.available2022-02-15T06:02:32Z
dc.date.issued2021-07-27
dc.departmentDepartment of Mechanical Engineeringen_US
dc.description.abstractDroplet evaporation has been intensively investigated in past decades owing to its emerging applications in diverse fields of science and technology. Yet the role of transport mechanisms has been the subject of a heated debate, especially the presence of Marangoni flow in water droplets. This work aims to draw a clear picture of the switching transport mechanisms inside a drying pinned sessile water droplet in both the presence and absence of thermocapillarity by developing a comprehensive model that accounts for all pertinent physics in both phases as well as interfacial phenomena at the interface. The model reveals a hitherto unexplored mixed radial and buoyant flow by shedding light on the transition from buoyancy induced Rayleigh flow to the radial flow causing the coffee ring effect. Predictions of the model excellently match previous experimental results across varying substrate temperatures only in the absence of Marangoni flow. When thermocapillarity is accounted for, strong surface flows shape the liquid velocity field during most of the droplet lifetime and the model starts to overestimate evaporation rates with increasing substrate temperature.en_US
dc.identifier.doi10.1103/PhysRevFluids.6.073605en_US
dc.identifier.eissn2469-990X
dc.identifier.urihttp://hdl.handle.net/11693/77340
dc.language.isoEnglishen_US
dc.publisherAmerican Physical Societyen_US
dc.relation.isversionofhttps://doi.org/10.1103/PhysRevFluids.6.073605en_US
dc.source.titlePhysical Review Fluidsen_US
dc.subjectDrop & bubble phenomenaen_US
dc.subjectEvaporationen_US
dc.subjectInstability of free-surface flowsen_US
dc.subjectMarangoni convectionen_US
dc.subjectRayleigh-Bénard convectionen_US
dc.subjectMultiphase flowsen_US
dc.subjectNavier-Stokes equationen_US
dc.titleInterplay of transport mechanisms during the evaporation of a pinned sessile water dropleten_US
dc.typeArticleen_US

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