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Acoustic metafluid with anisotropic mass density and tunable sound speed

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TitleInfo
Title
Acoustic metafluid with anisotropic mass density and tunable sound speed
Name (type = personal)
NamePart (type = family)
Seitel
NamePart (type = given)
Mark Joseph
NamePart (type = date)
1987-
DisplayForm
Mark Seitel
Role
RoleTerm (authority = RULIB)
author
Name (type = personal)
NamePart (type = family)
Shan
NamePart (type = given)
Jerry W.
DisplayForm
Jerry W. Shan
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
chair
Name (type = personal)
NamePart (type = family)
NORRIS
NamePart (type = given)
ANDREW
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ANDREW NORRIS
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
internal member
Name (type = personal)
NamePart (type = family)
Tse
NamePart (type = given)
Stephen D.
DisplayForm
Stephen D. Tse
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
internal member
Name (type = corporate)
NamePart
Rutgers University
Role
RoleTerm (authority = RULIB)
degree grantor
Name (type = corporate)
NamePart
Graduate School - New Brunswick
Role
RoleTerm (authority = RULIB)
school
TypeOfResource
Text
Genre (authority = marcgt)
theses
OriginInfo
DateCreated (qualifier = exact)
2012
DateOther (qualifier = exact); (type = degree)
2012-01
CopyrightDate (qualifier = exact)
2012
Place
PlaceTerm (type = code)
xx
Language
LanguageTerm (authority = ISO639-2b); (type = code)
eng
Abstract (type = abstract)
Metamaterials are artificially synthesized materials with uniquely engineered properties that do not occur in nature. Fabrication of such materials for application to acoustics has led to the creation of novel media with distinct bulk modulus and mass density characteristics. Studies in this field have typically examined how the properties of these unique materials can be used to manipulate either the attenuation or speed of a propagating sound wave. Previous works have used rigid structures with fluid cavities as a means to achieve changes in the acoustic behavior of the system. These approaches have resulted in the successful fabrication of materials with anisotropic mass density as well as advanced theoretical considerations for the creation of materials with anisotropic bulk modulus. This work uses a different approach to achieve anisotropic mass density, by creating a metafluid consisting of orientable anisotropic ferromagnetic particles. The anisotropy of the mass density is achieved through the induced mass of the particles, which varies with the particles’ alignment relative to the direction of wave propagation. The successful manipulation of the speed of sound is experimentally demonstrated for the two particle orientations examined, namely that of parallel and perpendicular alignment. The changes in the speed of sound are found to vary with frequency, confirming that the induced mass is the governing mechanism of the mass density anisotropy. Comparison of the experimental data to theoretical predictions reveals higher-than-expected variations in the acoustic wave speed. This behavior is qualitatively accounted for through experimental evidence that indicates particle-particle interactions, resulting in chained particle structures that effectively behave as a single particulate with larger dimensions. Furthermore, experimental investigations reveal that the magnitude of anisotropic wave speed can be controlled through the intensity of the external magnetic field used to align the particles.
Subject (authority = RUETD)
Topic
Mechanical and Aerospace Engineering
RelatedItem (type = host)
TitleInfo
Title
Rutgers University Electronic Theses and Dissertations
Identifier (type = RULIB)
ETD
Identifier
ETD_3765
PhysicalDescription
Form (authority = gmd)
electronic resource
InternetMediaType
application/pdf
InternetMediaType
text/xml
Extent
xv, 96 p. : ill.
Note (type = degree)
M.S.
Note (type = bibliography)
Includes bibliographical references
Note (type = vita)
Includes vita
Note (type = statement of responsibility)
by Mark Joseph Seitel
Subject (authority = ETD-LCSH)
Topic
Metamaterials
Subject (authority = ETD-LCSH)
Topic
Acoustical engineering
Identifier (type = hdl)
http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000064173
RelatedItem (type = host)
TitleInfo
Title
Graduate School - New Brunswick Electronic Theses and Dissertations
Identifier (type = local)
rucore19991600001
Location
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NjNbRU
Identifier (type = doi)
doi:10.7282/T3W0950N
Genre (authority = ExL-Esploro)
ETD graduate
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Rights

RightsDeclaration (ID = rulibRdec0006)
The author owns the copyright to this work.
RightsHolder (type = personal)
Name
FamilyName
Seitel
GivenName
Mark
Role
Copyright Holder
RightsEvent
Type
Permission or license
DateTime (encoding = w3cdtf); (qualifier = exact); (point = start)
2012-01-01 18:14:56
AssociatedEntity
Name
Mark Seitel
Role
Copyright holder
Affiliation
Rutgers University. Graduate School - New Brunswick
AssociatedObject
Type
License
Name
Author Agreement License
Detail
I hereby grant to the Rutgers University Libraries and to my school the non-exclusive right to archive, reproduce and distribute my thesis or dissertation, in whole or in part, and/or my abstract, in whole or in part, in and from an electronic format, subject to the release date subsequently stipulated in this submittal form and approved by my school. I represent and stipulate that the thesis or dissertation and its abstract are my original work, that they do not infringe or violate any rights of others, and that I make these grants as the sole owner of the rights to my thesis or dissertation and its abstract. I represent that I have obtained written permissions, when necessary, from the owner(s) of each third party copyrighted matter to be included in my thesis or dissertation and will supply copies of such upon request by my school. I acknowledge that RU ETD and my school will not distribute my thesis or dissertation or its abstract if, in their reasonable judgment, they believe all such rights have not been secured. I acknowledge that I retain ownership rights to the copyright of my work. I also retain the right to use all or part of this thesis or dissertation in future works, such as articles or books.
Copyright
Status
Copyright protected
Availability
Status
Open
Reason
Permission or license
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