Development of Pre-set Counter-rotating Streamwise Vortices in Wavy Channel

Handle URI:
http://hdl.handle.net/10754/581244
Title:
Development of Pre-set Counter-rotating Streamwise Vortices in Wavy Channel
Authors:
Budiman, A.C.; Mitsudharmadi, Hatsari ( 0000-0001-6575-1217 ) ; Bouremel, Y.; Winoto, S.H.; Low, H.T.
Abstract:
Development of counter-rotating streamwise vortices in a rectangular channel with one-sided wavy surface has been experimentally quantified using hot-wire anemometry. The wavy surface has fixed amplitude of 3.75 mm. The counter-rotating vortices are pre-set by means of a sawtooth pattern cut at the leading edge of the wavy surface. Variations of the central streamwise velocity Uc with a channel gap H = 35 mm and 50 mm (corresponding to a Reynolds number from 1600 to 4400) change the instability of the flow which can be distinguished from the velocity contours at a certain spanwise plane. The streamwise velocity contours and turbulence intensity for Reynolds number Re = 3100 and H = 35 mm show the disappearance of the mushroom-like vortices prior to turbulence near the second peak of the wavy surface, while for higher Re, this phenomenon occurs earlier. Under certain conditions, for example, for Re = 4400 and H = 50 mm, the splitting of the vortices can also be observed.
KAUST Department:
Reactive Flow Modeling Laboratory Group; Clean Combustion Research Center
Citation:
Development of Pre-set Counter-rotating Streamwise Vortices in Wavy Channel 2015 Experimental Thermal and Fluid Science
Publisher:
Elsevier BV
Journal:
Experimental Thermal and Fluid Science
Issue Date:
23-Oct-2015
DOI:
10.1016/j.expthermflusci.2015.10.016
Type:
Article
ISSN:
08941777
Additional Links:
http://linkinghub.elsevier.com/retrieve/pii/S0894177715002927
Appears in Collections:
Articles; Clean Combustion Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorBudiman, A.C.en
dc.contributor.authorMitsudharmadi, Hatsarien
dc.contributor.authorBouremel, Y.en
dc.contributor.authorWinoto, S.H.en
dc.contributor.authorLow, H.T.en
dc.date.accessioned2015-10-26T13:45:13Zen
dc.date.available2015-10-26T13:45:13Zen
dc.date.issued2015-10-23en
dc.identifier.citationDevelopment of Pre-set Counter-rotating Streamwise Vortices in Wavy Channel 2015 Experimental Thermal and Fluid Scienceen
dc.identifier.issn08941777en
dc.identifier.doi10.1016/j.expthermflusci.2015.10.016en
dc.identifier.urihttp://hdl.handle.net/10754/581244en
dc.description.abstractDevelopment of counter-rotating streamwise vortices in a rectangular channel with one-sided wavy surface has been experimentally quantified using hot-wire anemometry. The wavy surface has fixed amplitude of 3.75 mm. The counter-rotating vortices are pre-set by means of a sawtooth pattern cut at the leading edge of the wavy surface. Variations of the central streamwise velocity Uc with a channel gap H = 35 mm and 50 mm (corresponding to a Reynolds number from 1600 to 4400) change the instability of the flow which can be distinguished from the velocity contours at a certain spanwise plane. The streamwise velocity contours and turbulence intensity for Reynolds number Re = 3100 and H = 35 mm show the disappearance of the mushroom-like vortices prior to turbulence near the second peak of the wavy surface, while for higher Re, this phenomenon occurs earlier. Under certain conditions, for example, for Re = 4400 and H = 50 mm, the splitting of the vortices can also be observed.en
dc.language.isoenen
dc.publisherElsevier BVen
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S0894177715002927en
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Experimental Thermal and Fluid Science. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Experimental Thermal and Fluid Science, 23 October 2015. DOI: 10.1016/j.expthermflusci.2015.10.016en
dc.subjectcounter-rotating streamwise vorticesen
dc.subjectpre-set disturbanceen
dc.subjectWavy channelen
dc.subjecthot-wire anemometryen
dc.titleDevelopment of Pre-set Counter-rotating Streamwise Vortices in Wavy Channelen
dc.typeArticleen
dc.contributor.departmentReactive Flow Modeling Laboratory Groupen
dc.contributor.departmentClean Combustion Research Centeren
dc.identifier.journalExperimental Thermal and Fluid Scienceen
dc.eprint.versionPost-printen
dc.contributor.institutionDepartment of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576en
dc.contributor.institutionInstitute of Ophthalmology, University College London, 11-43 Bath Street, London EC1V 9EL, United Kingdomen
dc.contributor.institutionFaculty of Engineering, Universitas Diponegoro, Tembalang Campus, Semarang 50275, Indonesiaen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorMitsudharmadi, Hatsarien
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