Boundary layer transport of small particles

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dc.contributor.authorMcCready, Daviden
dc.contributor.committeecochairHicks, B.B.en
dc.contributor.committeecochairHughes, J.M.en
dc.contributor.committeememberHosker, R.P.en
dc.contributor.committeememberWiggert, James M.en
dc.contributor.committeememberBoardman, Gregoryen
dc.contributor.committeememberRandall, Clifford W.en
dc.contributor.departmentCivil Engineeringen
dc.date.accessioned2017-01-30T21:23:55Zen
dc.date.available2017-01-30T21:23:55Zen
dc.date.issued1984en
dc.description.abstractThe transport of small particles across the aerodynamic boundary layer that developed over a smooth, flat, acrylic plate and their subsequent deposition was investigated. The velocity boundary layer over the flat plate was characterized for a wind tunnel mainstream velocity of 2 m/s. Particle deposition was quantified with respect to location on the experimental plate with a microscope. The deposition of 0.8, 0.9, 1.1, and 2.0 micron diameter unit density, polystyrene latex microspheres on to oil-coated, uncoated, upper, and lower surfaces was investigated. Although experimental deposition velocities exhibited run-to-run variation, they were significantly greater than those reported in the literature. A turbulent flow deposition model which included eddy diffusion, Brownian diffusion, inertial, and gravitational deposition mechanisms underestimated the experimental deposition velocities. The experimental plate was nonconductive and could not be electrically grounded. It appears the electrostatic attraction mechanism was responsible for the increased experimental deposition velocities; this mechanism was not included in the deposition model. There was no significant resuspension of 42 micron diameter microspheres deposited to an initially moist experimental plate after 6 hours in the wind tunnel at a mean air velocity of 2 m/s.en
dc.description.degreePh. D.en
dc.format.extentxii, 211 leavesen
dc.format.mimetypeapplication/pdfen
dc.identifier.urihttp://hdl.handle.net/10919/74703en
dc.language.isoen_USen
dc.publisherVirginia Polytechnic Institute and State Universityen
dc.relation.isformatofOCLC# 11206992en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V856 1984.M427en
dc.subject.lcshTurbulent boundary layeren
dc.subject.lcshAerosolsen
dc.subject.lcshParticlesen
dc.titleBoundary layer transport of small particlesen
dc.typeDissertationen
dc.type.dcmitypeTexten
thesis.degree.disciplineCivil Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.namePh. D.en

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