Numerical simulations of elliptical jets: a study of jet entrainment

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dc.contributor.authorMutter, Troy Blakeen
dc.contributor.departmentMechanical Engineeringen
dc.date.accessioned2014-03-14T21:40:06Zen
dc.date.adate2009-07-10en
dc.date.available2014-03-14T21:40:06Zen
dc.date.issued1994en
dc.date.rdate2009-07-10en
dc.date.sdate2009-07-10en
dc.description.abstractFree jets are naturally unstable. As a result the jet which is initially laminar becomes turbulent. During this transition process, large-scale structures are formed and fluid is "induced" to join the jet from the surroundings. This induction of fluid is defined as entrainment and depends greatly upon the jet geometry. In particular, an elliptical jet has been found to entrain at a higher rate than its circular counterpart. Numerical simulations of elliptical jets have been conducted on NRL’s parallel CM-5 and CM-200 supercomputers using the Flux Corrected Transport algorithm and initialized with the results of a linear stability analysis with the objective of investigating the entrainment process and explaining the dependence of the entrainment on jet geometry. Through the medium of scientific visualization, mechanisms responsible for entrainment have been identified and associated with the results of a linear stability analysis to suggest passive means by which entrainment can be enhanced. In particular, it was found that increasing the aspect ratio, thinning the shear layer, and non-uniformly distributing the shear layer serve to increase entrainment.en
dc.description.degreeMaster of Scienceen
dc.format.extentix, 132 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-07102009-040630en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-07102009-040630/en
dc.identifier.urihttp://hdl.handle.net/10919/43648en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1994.M889.pdfen
dc.relation.isformatofOCLC# 30609386en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1994.M889en
dc.subject.lcshJets -- Fluid dynamics -- Mathematical modelsen
dc.titleNumerical simulations of elliptical jets: a study of jet entrainmenten
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineMechanical Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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