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A study of the fine-scale three-dimensional flow structures in turbulence using time-resolved stereoscopic scanning particle image velocimetry
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TitleInfo
Title
A study of the fine-scale three-dimensional flow structures in turbulence using time-resolved stereoscopic scanning particle image velocimetry
Name (type = personal)
NamePart (type = family)
Cheng
NamePart (type = given)
Ye
NamePart (type = date)
1983-
DisplayForm
Ye Cheng
Role
RoleTerm (authority = RULIB)
author
Name (type = personal)
NamePart (type = family)
Diez
NamePart (type = given)
Francisco Javier
DisplayForm
Francisco Javier Diez
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
chair
Name (type = personal)
NamePart (type = family)
Jaluria
NamePart (type = given)
Yogesh
DisplayForm
Yogesh Jaluria
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
internal member
Name (type = personal)
NamePart (type = family)
Knight
NamePart (type = given)
Doyle
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Doyle Knight
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
internal member
Name (type = personal)
NamePart (type = family)
Guo
NamePart (type = given)
Qizhong
DisplayForm
Qizhong Guo
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
outside 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)
2011
DateOther (qualifier = exact); (type = degree)
2011-10
CopyrightDate (qualifier = exact)
2011
Place
PlaceTerm (type = code)
xx
Language
LanguageTerm (authority = ISO639-2b); (type = code)
eng
Abstract (type = abstract)
A time-resolved stereoscopic scanning particle image velocimetry (TR-SSPIV) system was developed to investigate the fine-scale 3D structures in free shear turbulent jets. The system provided a simultaneous measurement of the three-component velocity field in a three-dimensional volume (3D3C) with Kolmogorov-scale (eta) resolution, providing a true representation of the complete nine-component velocity gradient tensor. Quantitative visualization of the coherent structures at fine-scale turbulence is obtained and four basic structural shapes (sheets, tube, square ribbons and spherical blobs) are identified as building blocks of complex turbulent structures. The measurement volume had dimensions of 43eta x 20eta x 18eta, which allowed isolating individual structures. These rendered shapes had dimensions that range from 1.5-5eta to 20-30eta. The local acceleration du/dt is obtained and represented as 3D structures. These showed a strong anti-alignment with the convective acceleration term, which helps validate experimentally the Random Taylor Hypothesis. A novel vortex identification scheme is also introduced based on the local pressure. The method is compared to other published ones including enstrophy, Q, Lambda2 and Delta criteria. Four different flow configurations are tested and extensive statistical analyses are performed to study the probability density function (PDF), joint PDF, and spectra of the velocity gradients. The analysis also considered the vorticity, rate of strain, enstrophy, and dynamic parameters such as enstrophy production rate and energy dissipation rate. Accuracy assessments included result comparison to isotropy theory and evaluation of the local conservation of mass. The flow statistics and scaling of turbulence at fine scales are compared extensively to published theoretical, numerical, and experimental results.
Subject (authority = RUETD)
Topic
Mechanical and Aerospace Engineering
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TitleInfo
Title
Rutgers University Electronic Theses and Dissertations
Identifier (type = RULIB)
ETD
Identifier
ETD_3596
PhysicalDescription
Form (authority = gmd)
electronic resource
InternetMediaType
application/pdf
InternetMediaType
text/xml
Extent
xiv, 154 p. : ill.
Note (type = degree)
Ph.D.
Note (type = bibliography)
Includes bibliographical references
Note (type = statement of responsibility)
by Ye Cheng
Subject (authority = ETD-LCSH)
Topic
Turbulence
Identifier (type = hdl)
http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000063353
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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/T3HD7TRB
Genre (authority = ExL-Esploro)
ETD doctoral
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Rights

RightsDeclaration (ID = rulibRdec0006)
The author owns the copyright to this work.
RightsHolder (type = personal)
Name
FamilyName
Cheng
GivenName
Ye
Role
Copyright Holder
RightsEvent
Type
Permission or license
DateTime (encoding = w3cdtf); (qualifier = exact); (point = start)
2011-09-26 16:04:17
AssociatedEntity
Name
Ye Cheng
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.
RightsEvent
DateTime (encoding = w3cdtf); (qualifier = exact); (point = start)
2011-10-31
DateTime (encoding = w3cdtf); (qualifier = exact); (point = end)
2012-05-01
Type
Embargo
Detail
Access to this PDF has been restricted at the author's request. It will be publicly available after May 1st, 2012.
Copyright
Status
Copyright protected
Availability
Status
Open
Reason
Permission or license
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Technical

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4338176
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application/x-tar
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4341760
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