Under Liquid Wetting Dynamics

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dc.contributor.advisorMitra, Sushanta
dc.creatorMitra, Surjyasish
dc.date.accessioned2017-07-28T14:49:12Z
dc.date.available2017-07-28T14:49:12Z
dc.date.copyright2016-08-26
dc.date.issued2017-07-28
dc.date.updated2017-07-28T14:49:11Z
dc.degree.disciplineMechanical Engineering
dc.degree.levelMaster's
dc.degree.nameMASc - Master of Applied Science
dc.description.abstractLiquid drops wetting a surface kept in ambient air has been widely studied over the last few decades due to its manifold applications in technology and industry. However, for a surface kept submerged under-liquid, such wetting processes have been studied to a lesser extent. Understanding how a liquid drop interacts with a surface in the presence of another liquid medium is pivotal towards growing applications in marine ecosystem, environmental effects of oil-spills, advanced manufacturing techniques like immersion lithography, etc. It also poses the challenging issues of liquid-liquid displacement and contact line dynamics. The present study delineated some fundamentals of under-liquid wettability like coalescence of two sessile drops on an under-liquid substrate, spreading of liquid drops on an underliquid substrate and drop interaction with submerged micro-patterned substrates.Through relevant theoretical analysis as well as experimentation, it was found that the existing theories of drop interaction with a surface in air are inadequate when a surrounding liquid medium is considered, and needs to be modified bringing into effect key parameters of the surrounding medium, such as its density and viscosity. Consideration of a surrounding liquid medium also allows to provide a unifying framework to study such wetting processes. For coalescence and spreading, a universal behavior was observed in terms of the initial fast wetting regime inherent to such processes, and the notion of coalescence-spreading analogy was found acceptable to describe such phenomenon. However, for under-liquid wetting signature of micro-patterned substrates, a non-universal behavior was observed which indicates the need of newer theoretical approach to better understand wetting phenomenon on such under-liquid surfaces.
dc.identifier.urihttp://hdl.handle.net/10315/33644
dc.language.isoen
dc.rightsAuthor owns copyright, except where explicitly noted. Please contact the author directly with licensing requests.
dc.subjectMechanics
dc.subject.keywordsWetting
dc.subject.keywordsDrops
dc.subject.keywordsUnder-liquid
dc.subject.keywordsCoalescence
dc.subject.keywordsSpreading
dc.subject.keywordsFluid mechanics
dc.titleUnder Liquid Wetting Dynamics
dc.typeElectronic Thesis or Dissertation

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