Visualization of pre-set vortices in boundary layer flow over wavy surface in rectangular channel

Handle URI:
http://hdl.handle.net/10754/566188
Title:
Visualization of pre-set vortices in boundary layer flow over wavy surface in rectangular channel
Authors:
Budiman, Alexander Christantho; Mitsudharmadi, Hatsari ( 0000-0001-6575-1217 ) ; Bouremel, Yann; Winoto, Sonny H.; Low, H. T.
Abstract:
Abstract: Smoke-wire flow visualization is used to study the development of pre-set counter-rotating streamwise vortices in boundary layer flow over a wavy surface in a rectangular channel. The formation of the vortices is indicated by the vortical structures on the cross-sectional plane normal to the wavy surface. To obtain uniform spanwise vortex wavelength which will result in uniform vortex size, two types of spanwise disturbances were used: a series of perturbation wires placed prior and normal to the leading edge of the wavy surface, and a jagged pattern in the form of uniform triangles cut at the leading edge. These perturbation wires and jagged pattern induce low-velocity streaks that result in the formation of counter-rotating streamwise vortices that evolve downstream to form the mushroom-like structures on the cross-sectional plane of the flow. The evolution of the most amplified disturbances can be attributed to the formation of these mushroom-like structures. It is also shown that the size of the mushroom-like structures depends on the channel entrance geometry, Reynolds number, and the channel gap.Graphical Abstract: [Figure not available: see fulltext.]
KAUST Department:
Clean Combustion Research Center
Publisher:
Springer Science + Business Media
Journal:
Journal of Visualization
Issue Date:
4-Dec-2014
DOI:
10.1007/s12650-014-0252-z
Type:
Article
ISSN:
13438875
Appears in Collections:
Articles; Clean Combustion Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorBudiman, Alexander Christanthoen
dc.contributor.authorMitsudharmadi, Hatsarien
dc.contributor.authorBouremel, Yannen
dc.contributor.authorWinoto, Sonny H.en
dc.contributor.authorLow, H. T.en
dc.date.accessioned2015-08-12T09:31:42Zen
dc.date.available2015-08-12T09:31:42Zen
dc.date.issued2014-12-04en
dc.identifier.issn13438875en
dc.identifier.doi10.1007/s12650-014-0252-zen
dc.identifier.urihttp://hdl.handle.net/10754/566188en
dc.description.abstractAbstract: Smoke-wire flow visualization is used to study the development of pre-set counter-rotating streamwise vortices in boundary layer flow over a wavy surface in a rectangular channel. The formation of the vortices is indicated by the vortical structures on the cross-sectional plane normal to the wavy surface. To obtain uniform spanwise vortex wavelength which will result in uniform vortex size, two types of spanwise disturbances were used: a series of perturbation wires placed prior and normal to the leading edge of the wavy surface, and a jagged pattern in the form of uniform triangles cut at the leading edge. These perturbation wires and jagged pattern induce low-velocity streaks that result in the formation of counter-rotating streamwise vortices that evolve downstream to form the mushroom-like structures on the cross-sectional plane of the flow. The evolution of the most amplified disturbances can be attributed to the formation of these mushroom-like structures. It is also shown that the size of the mushroom-like structures depends on the channel entrance geometry, Reynolds number, and the channel gap.Graphical Abstract: [Figure not available: see fulltext.]en
dc.publisherSpringer Science + Business Mediaen
dc.subjectBoundary layer flowen
dc.subjectCounter-rotating streamwise vorticesen
dc.subjectFlow instabilityen
dc.subjectSmoke-wire flow visualizationen
dc.subjectTriangular pattern leading edgeen
dc.subjectWavy surfaceen
dc.titleVisualization of pre-set vortices in boundary layer flow over wavy surface in rectangular channelen
dc.typeArticleen
dc.contributor.departmentClean Combustion Research Centeren
dc.identifier.journalJournal of Visualizationen
dc.contributor.institutionDepartment of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1Singapore, Singaporeen
dc.contributor.institutionExperimental Aeroscience Group, Temasek Laboratories at National University of Singapore, 5A Engineering Drive 1 #09-02Singapore, Singaporeen
dc.contributor.institutionFormerly at Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1Singapore, Singaporeen
kaust.authorMitsudharmadi, Hatsarien
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