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dc.contributor.advisorThoroddsen, Sigurdur T
dc.contributor.authorThoraval, Marie-Jean
dc.date.accessioned2013-06-11T13:07:50Z
dc.date.available2013-06-11T00:00:00Z
dc.date.issued2013-03
dc.identifier.doi10.25781/KAUST-2W9GV
dc.identifier.urihttp://hdl.handle.net/10754/293818
dc.description.abstractDrop impact is a canonical problem in fluid mechanics, with numerous applications in industrial as well as natural phenomena. The extremely simple initial configuration of the experiment can produce a very large variety of fast and complex dynamics. Scientific progress was made in parallel with major improvements in imaging and computational technologies. Most recently, high-speed imaging video cameras have opened the exploration of new phenomena occurring at the micro-second scale, and parallel computing allowed realistic direct numerical simulations of drop impacts. We combine these tools to bring a new understanding of two fundamental aspects of drop impacts: splashing and air entrapment. The early dynamics of a drop impacting on a liquid pool at high velocity produces an ejecta sheet, emerging horizontally in the neck between the drop and the pool. We show how the interaction of this thin liquid sheet with the air, the drop or the pool, can produce micro-droplets and bubble rings. Then we detail how the breakup of the air film stretched between the drop and the pool for lower impact velocities can produce a myriad of micro-bubbles.
dc.language.isoen
dc.subjectDrop Impact
dc.subjectBubble Entrapment
dc.subjectVortex Street
dc.subjectGerris
dc.subjectSplashing
dc.subjectFilm Breakup
dc.subjectejecta sheet
dc.subjectslingshot mechanism
dc.subjectbubble ring
dc.subjectair toroid
dc.subjectliquid toroid
dc.subjectVOF
dc.subjectvortex shedding
dc.subjectair entrapment
dc.subjectMesler entrainment
dc.titleDrop impact splashing and air entrapment
dc.typeDissertation
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.rights.embargodate2013-06-11
thesis.degree.grantorKing Abdullah University of Science and Technology
dc.contributor.committeememberChung, Suk Ho
dc.contributor.committeememberKasimov, Aslan R.
dc.contributor.committeememberQuere, David
dc.contributor.committeememberSamtaney, Ravi
thesis.degree.disciplineMechanical Engineering
thesis.degree.nameDoctor of Philosophy
dc.rights.accessrightsAt the time of archiving, the student author of this dissertation opted to temporarily restrict access to it. The full text of this dissertation became available to the public after the expiration of the embargo on 2013-06-11.
refterms.dateFOA2013-06-11T00:00:00Z


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