Please use this identifier to cite or link to this item: https://doi.org/10.1117/12.851461
DC FieldValue
dc.titleDiscontinuities in the S-Re relations of trapezoidal and triangular cylinders
dc.contributor.authorLuo, S.C.
dc.contributor.authorEng, G.R.C.
dc.date.accessioned2014-06-19T05:34:16Z
dc.date.available2014-06-19T05:34:16Z
dc.date.issued2010
dc.identifier.citationLuo, S.C., Eng, G.R.C. (2010). Discontinuities in the S-Re relations of trapezoidal and triangular cylinders. Proceedings of SPIE - The International Society for Optical Engineering 7522 : -. ScholarBank@NUS Repository. https://doi.org/10.1117/12.851461
dc.identifier.isbn9780819479129
dc.identifier.issn0277786X
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/73366
dc.description.abstractFrom past research, it is known that even for a very slender cylinder with aspect ratio of several hundreds, the flow remains two-dimensional only at low Reynolds number, and will become three-dimensional once a certain critical Reynolds number is exceeded. Most of the works reported are for circular and square cylinders. The present work is intended to look into wake transition phenomena that take place in the wake of two different trapezoidal and one triangular cylinders. With the experiment set up in a water tunnel, the frequency of vortices shed from trapezoidal and triangular cylinders was carefully measured using hot film anemometry. Experimental data revealed that the discontinuities in the S-Re relation, similar to those observed for circular and square cylinders and which mark the transition of the wake to Mode A and Mode B instabilities, are also present in flow past trapezoidal and triangular cylinders. However, the Reynolds numbers at which the discontinuities take place are cross-sectional geometry dependent. For Trapezoidal Cylinder 1 and 2 with a rear face 75% and 50% the length of the front face, respectively, the two discontinuities in the S-Re relation take place at Re = 152 & 173 and 143 & 176, respectively. For the Triangular Cylinder with apex pointing downstream, the first discontinuity occurs at Re = 164. Some preliminary flow visualization was also carried out to confirm the existence of the streamwise vortices associated with Mode A and B instabilities. © 2010 SPIE.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1117/12.851461
dc.sourceScopus
dc.subject3-D wake
dc.subjectAfterbody effects
dc.subjectFlow past trapezoidal cylinder
dc.subjectFlow past triangular cylinder
dc.subjectMode A instability
dc.subjectMode B instability
dc.subjectWake transition phenomena
dc.typeConference Paper
dc.contributor.departmentMECHANICAL ENGINEERING
dc.description.doi10.1117/12.851461
dc.description.sourcetitleProceedings of SPIE - The International Society for Optical Engineering
dc.description.volume7522
dc.description.page-
dc.description.codenPSISD
dc.identifier.isiut000285572800045
Appears in Collections:Staff Publications

Show simple item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

3
checked on Oct 7, 2019

WEB OF SCIENCETM
Citations

2
checked on Oct 7, 2019

Page view(s)

50
checked on Oct 13, 2019

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.