Note
College of Engineering and Computer Science
Member of
Contributors
Publisher
Florida Atlantic University
Date Issued
2007
EDTF Date Created
2007
Description
Boundary layer control on a circular cylindrical body through oscillating Lorentz
forcing is studied by means of numerical simulation of the vorticity-stream
function formulation of the Navier-Stokes equations. The model problem
considers axisymmetric seawater flow along an infinite cylinder controlled by an
idealized radially directed Lorentz force oscillating spatially and temporally.
Under optimum forcing parameters, it is shown that sustainable Lorentz induced
vortex rings can travel along the cylinder at a speed equivalent to the phase
speed of forcing . Wall stress is shown to locally change sign in the region
adjacent to the vortex, considerably decreasing net viscous drag . Adverse flow
behaviors are revealed as a result of studying the effects of the Reynolds
numbers, strength of the Lorentz force, and phase speed of forcing for boundary
layer control. Adverse flow behaviors inc I ude complex vortex configurations
found for suboptimal forcing resulting in a considerable increase in wall stress.
forcing is studied by means of numerical simulation of the vorticity-stream
function formulation of the Navier-Stokes equations. The model problem
considers axisymmetric seawater flow along an infinite cylinder controlled by an
idealized radially directed Lorentz force oscillating spatially and temporally.
Under optimum forcing parameters, it is shown that sustainable Lorentz induced
vortex rings can travel along the cylinder at a speed equivalent to the phase
speed of forcing . Wall stress is shown to locally change sign in the region
adjacent to the vortex, considerably decreasing net viscous drag . Adverse flow
behaviors are revealed as a result of studying the effects of the Reynolds
numbers, strength of the Lorentz force, and phase speed of forcing for boundary
layer control. Adverse flow behaviors inc I ude complex vortex configurations
found for suboptimal forcing resulting in a considerable increase in wall stress.
Language
Type
Form
Extent
123 p.
Subject (Topical)
Identifier
FA00012549
Additional Information
College of Engineering and Computer Science
Thesis (M.S.)--Florida Atlantic University, 2007.
FAU Electronic Theses and Dissertations Collection
Date Backup
2007
Date Created Backup
2007
Date Text
2007
Date Created (EDTF)
2007
Date Issued (EDTF)
2007
Extension
FAU
IID
FA00012549
Organizations
Attributed name: Florida Atlantic University
Attributed name: College of Engineering and Computer Science
Attributed name: Department of Ocean and Mechanical Engineering
Person Preferred Name
Seltzer, Ryan K.
Graduate College
Physical Description
application/pdf
123 p.
Title Plain
Boundary Layer Control on a Circular Cylindrical Body through Oscillating Lorentz Forcing
Use and Reproduction
Copyright © is held by the author with permission granted to Florida Atlantic University to digitize, archive and distribute this item for non-profit research and educational purposes. Any reuse of this item in excess of fair use or other copyright exemptions requires permission of the copyright holder.
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Origin Information
2007
2007
Florida Atlantic University
Boca Raton, Fla.
Physical Location
Florida Atlantic University Libraries
Place
Boca Raton, Fla.
Sub Location
Digital Library
Title
Boundary Layer Control on a Circular Cylindrical Body through Oscillating Lorentz Forcing
Other Title Info
Boundary Layer Control on a Circular Cylindrical Body through Oscillating Lorentz Forcing