Effect of corner radius in stabilizing the low-Re flow past a cylinder

Handle URI:
http://hdl.handle.net/10754/625311
Title:
Effect of corner radius in stabilizing the low-Re flow past a cylinder
Authors:
Zhang, Wei; Samtaney, Ravindra
Abstract:
We perform global linear stability analysis on low-Re flow past an isolated cylinder with rounded corners. The objective of the present work is to investigate the effect of the cylinder geometry (corner radius) on the stability characteristics of the flow. Our investigation sheds light on new physics that the flow can be stabilized by partially rounding the cylinder in the critical and weakly super-critical flow regimes. The flow is first stabilized and then gradually destabilized as the cylinder varies from square to circular geometry. The sensitivity analysis reveals that the variation of stability is attributed to the different spatial variation trends of the backflow velocity in the near- and far-wake regions for various cylinder geometries. The results from the stability analysis are also verified with those of the direct simulations and very good agreement is achieved.
KAUST Department:
Mechanical Engineering Program
Citation:
Zhang W, Samtaney R (2017) Effect of corner radius in stabilizing the low-Re flow past a cylinder. Journal of Fluids Engineering. Available: http://dx.doi.org/10.1115/1.4037494.
Publisher:
ASME International
Journal:
Journal of Fluids Engineering
Issue Date:
3-Aug-2017
DOI:
10.1115/1.4037494
Type:
Article
ISSN:
0098-2202
Sponsors:
W. Z. would like to thank the support from NSFC (51536008). The IBM Blue Gene/P Shaheen at KAUST was utilized for the simulations under the KAUST Office of Competitive Research Funds (URF/1/1394-01). The comments from the reviewers are appreciated.
Additional Links:
http://fluidsengineering.asmedigitalcollection.asme.org/article.aspx?articleid=2647995
Appears in Collections:
Articles; Mechanical Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorZhang, Weien
dc.contributor.authorSamtaney, Ravindraen
dc.date.accessioned2017-08-10T11:43:33Z-
dc.date.available2017-08-10T11:43:33Z-
dc.date.issued2017-08-03en
dc.identifier.citationZhang W, Samtaney R (2017) Effect of corner radius in stabilizing the low-Re flow past a cylinder. Journal of Fluids Engineering. Available: http://dx.doi.org/10.1115/1.4037494.en
dc.identifier.issn0098-2202en
dc.identifier.doi10.1115/1.4037494en
dc.identifier.urihttp://hdl.handle.net/10754/625311-
dc.description.abstractWe perform global linear stability analysis on low-Re flow past an isolated cylinder with rounded corners. The objective of the present work is to investigate the effect of the cylinder geometry (corner radius) on the stability characteristics of the flow. Our investigation sheds light on new physics that the flow can be stabilized by partially rounding the cylinder in the critical and weakly super-critical flow regimes. The flow is first stabilized and then gradually destabilized as the cylinder varies from square to circular geometry. The sensitivity analysis reveals that the variation of stability is attributed to the different spatial variation trends of the backflow velocity in the near- and far-wake regions for various cylinder geometries. The results from the stability analysis are also verified with those of the direct simulations and very good agreement is achieved.en
dc.description.sponsorshipW. Z. would like to thank the support from NSFC (51536008). The IBM Blue Gene/P Shaheen at KAUST was utilized for the simulations under the KAUST Office of Competitive Research Funds (URF/1/1394-01). The comments from the reviewers are appreciated.en
dc.publisherASME Internationalen
dc.relation.urlhttp://fluidsengineering.asmedigitalcollection.asme.org/article.aspx?articleid=2647995en
dc.rightsArchived with thanks to Journal of Fluids Engineeringen
dc.titleEffect of corner radius in stabilizing the low-Re flow past a cylinderen
dc.typeArticleen
dc.contributor.departmentMechanical Engineering Programen
dc.identifier.journalJournal of Fluids Engineeringen
dc.eprint.versionPost-printen
dc.contributor.institutionFaculty of Mechanical Engineering and Automation, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, Chinaen
kaust.authorSamtaney, Ravindraen
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