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Title:A Study of Spherical Bubbles in a Vertical Turbulent Boundary Layer
Author(s):Felton, Keith Carnel
Doctoral Committee Chair(s):Loth, Eric
Department / Program:Mechanical Engineering
Discipline:Mechanical Engineering
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Engineering, Marine and Ocean
Abstract:Liquid forces acting on individual bubbles in this turbulent boundary layer were also explored. This task was accomplished by employing a cinematic Particle Image Velocimetry system. Quadruple-pulsed images were obtained in a temporal sequence, such that the instantaneous liquid velocity and bubble trajectories could be accurately determined. Bubble velocity, acceleration, and buoyancy force were obtained from the trajectory data. Analysis of the force results indicate that drag coefficient decreases with increasing Reynolds number, but decreases with increased turbulence intensity. The lift coefficient is much higher than creeping flow or inviscid theory and tends to decrease with increasing bubble Reynolds number.
Issue Date:1999
Description:204 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1999.
Other Identifier(s):(MiAaPQ)AAI9953012
Date Available in IDEALS:2015-09-25
Date Deposited:1999

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