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dc.contributor.authorYang, Zi Qiang
dc.contributor.authorTian, Yuan Si
dc.contributor.authorThoroddsen, Sigurður T
dc.date.accessioned2020-04-23T10:45:30Z
dc.date.available2020-04-23T10:45:30Z
dc.date.issued2020-04-15
dc.identifier.urihttp://hdl.handle.net/10754/662623
dc.description.abstractUnderstanding the dynamical transition from capillary-driven to pure inertial focusing is important to revealing the mechanism underlying the most singular micro-jetting produced from drop-impact craters. Herein we study dimple dynamics from the collapse of these craters when the drop is of a different immiscible liquid than the pool. The parameter space is considerably more complex than for identical liquids, revealing intricate compound-dimple shapes. In contrast to the universal capillary-inertial drop pinch-off regime, where the neck radius scales as $R\sim t^{2/3}$, a purely inertial collapse of the air-dimple portrays $R \sim t^{1/2}$ and is sensitive to initial and boundary conditions. Capillary waves can therefore mold the dimple into different collapse shapes. We observe a clear cross-over in the nature of the dynamics from capillary-inertial to purely inertial immediately before the pinch-off. Notably, for singular jetting the cross-over time occurs much earlier, irrespective of the Weber number.
dc.publisherarXiv
dc.relation.urlhttps://arxiv.org/pdf/2004.07817
dc.rightsArchived with thanks to arXiv
dc.titleDynamic transition approaching jetting singularity during the collapse of drop-impact craters
dc.typePreprint
dc.contributor.departmentDivision of Physical Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia.
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.eprint.versionPre-print
dc.identifier.arxivid2004.07817
kaust.personYang, Zi Qiang
kaust.personTian, Yuan Si
kaust.personThoroddsen, Sigurður T
refterms.dateFOA2020-04-23T10:46:10Z


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