dc.creator | Garcia Geijo, Paula | es |
dc.creator | Quintero, E. S. | es |
dc.creator | Riboux, Guillaume Maurice | es |
dc.creator | Gordillo Arias de Saavedra, José Manuel | es |
dc.date.accessioned | 2021-09-01T15:36:01Z | |
dc.date.available | 2021-09-01T15:36:01Z | |
dc.date.issued | 2021 | |
dc.identifier.citation | Garcia Geijo, P., Quintero, E.S., Riboux, G.M. y Gordillo Arias de Saavedra, J.M. (2021). Spreading and splashing of drops impacting rough substrates. Journal of Fluid Mechanics, 917, Article number A50. | |
dc.identifier.issn | 0022-1120 | es |
dc.identifier.uri | https://hdl.handle.net/11441/125274 | |
dc.description | Article number A50 | es |
dc.description.abstract | Here, we present experimental results of water and ethanol drops of radii R, density ρ
and interfacial tension coefficient σ, impacting with a velocity V over different types of
sandpapers containing particles of characteristic diameter ε embedded in their surfaces. It
is shown that the transition from spreading to splashing at normal atmospheric conditions
can be classified depending on the value of the parameter ε/Ht Weε = We(ε/R), with
We = ρV2R/σ the Weber number and Ht indicating the initial thickness of the thin film
– the lamella – which is ejected along the substrate once the drop touches the solid.
When Weε 1 and the liquid wets the substrate, the critical value of the Weber number
above which the drop splashes, Wec, can be predicted using the results in Gordillo &
Riboux (J. Fluid Mech., vol. 871, 2019, R3) once the angle the advancing rim forms with
the substrate, α, is expressed as a decreasing function of the static advancing contact
angle. The calculated values of Wec for the case of water drops impacting over rough
substrates are smaller than the corresponding ones for smooth substrates, in agreement
with experimental observations. Moreover, if the liquid does not wet the substrate, it is
also shown that the splash velocity can be predicted using the theory for superhydrophobic
substrates in Quintero, Riboux & Gordillo (J. Fluid Mech., vol. 870, 2019, 175–188). For
those cases in which Weε 1 and the liquid wets the substrate, we demonstrate that the
critical Weber number for splashing decreases with ε as Wec ∝ (R cos θ0/ε)3/5, with θ0
the value of the Young contact angle. | es |
dc.description.sponsorship | Ministerio de Economía y Competitividad (España) DPI2017-88201-C3-1-R | es |
dc.format | application/pdf | es |
dc.format.extent | 29 p. | es |
dc.language.iso | eng | es |
dc.publisher | Publisher Cambridge University Press | es |
dc.relation.ispartof | Journal of Fluid Mechanics, 917, Article number A50. | |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.subject | Aerosols/atomization | es |
dc.subject | Drops | es |
dc.title | Spreading and splashing of drops impacting rough substrates | es |
dc.type | info:eu-repo/semantics/article | es |
dcterms.identifier | https://ror.org/03yxnpp24 | |
dc.type.version | info:eu-repo/semantics/publishedVersion | es |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es |
dc.contributor.affiliation | Universidad de Sevilla. Departamento de Ingeniería Aeroespacial y Mecánica de Fluidos | es |
dc.relation.projectID | DPI2017-88201-C3-1-R | es |
dc.relation.publisherversion | https://www.cambridge.org/core/journals/journal-of-fluid-mechanics/article/spreading-and-splashing-of-drops-impacting-rough-substrates/6D74E8E32D501CFBAD2B6983AE7D3BD2 | es |
dc.identifier.doi | 10.1017/jfm.2021.313 | es |
dc.journaltitle | Journal of Fluid Mechanics | es |
dc.publication.volumen | 917 | es |
dc.publication.initialPage | Article number A50 | es |