Numerical Simulations for Turbulent Drag Reduction Using Liquid Infused Surfaces

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dc.contributor.ORCID0000-0002-4570-2255 (Leonardi, S)
dc.contributor.advisorLeonardi, Stefano
dc.contributor.advisorMinkoff, Susan E
dc.creatorArenas-Navarro, Isnardo
dc.date.accessioned2018-03-12T20:32:08Z
dc.date.available2018-03-12T20:32:08Z
dc.date.created2017-12
dc.date.issued2017-12
dc.date.submittedDecember 2017
dc.date.updated2018-03-12T20:32:08Z
dc.description.abstractNumerical simulations of the turbulent flow over Super Hydrophobic and Liquid Infused Surfaces have been performed in this work. Three different textured surfaces have been considered: longitudinal square bars, transversal square bars and staggered cubes. The numerical code combines an immersed boundary method to mimic the substrate and a level set method to track the interface. Liquid Infused Surfaces reduce the drag by locking a lubricant within structured roughness to facilitate a slip velocity at the surface interface. The conceptual idea is similar to Super Hydrophobic Surfaces, which rely on a lubricant air layer, whereas liquid-infused surfaces use a preferentially wetting liquid lubricant to create a fluid-fluid interface. This slipping interface has been shown to be an effective method of passively reducing skin friction drag in turbulent flows. Details are given on the effect of the viscosity ratio between the two fluids and the dynamics of the interface on drag reduction. An attempt has been made to reconcile Super-Hydrophobic, Liquid Infused and rough wall under the same framework by correlating the drag to the wall normal velocity fluctuations.
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/10735.1/5646
dc.language.isoen
dc.rightsCopyright ©2017 is held by the author. Digital access to this material is made possible by the Eugene McDermott Library. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
dc.subjectComputational fluid dynamics-Simulation methods
dc.subjectFluids
dc.subjectSkin friction (Aerodynamics)
dc.subjectSurface chemistry
dc.subjectViscosity
dc.titleNumerical Simulations for Turbulent Drag Reduction Using Liquid Infused Surfaces
dc.typeDissertation
dc.type.materialtext
thesis.degree.departmentMathematics
thesis.degree.grantorThe University of Texas at Dallas
thesis.degree.levelDoctoral
thesis.degree.namePHD

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