Turbulence control in wall-bounded flows by spanwise oscillations
dc.contributor.author | Akhavan, R. | en_US |
dc.contributor.author | Jung, W. J. | en_US |
dc.contributor.author | Mangiavacchi, N. | en_US |
dc.date.accessioned | 2006-09-08T19:39:19Z | |
dc.date.available | 2006-09-08T19:39:19Z | |
dc.date.issued | 1993-06 | en_US |
dc.identifier.citation | Akhavan, R.; Jung, W. J.; Mangiavacchi, N.; (1993). "Turbulence control in wall-bounded flows by spanwise oscillations." Applied Scientific Research 51 (1-2): 299-303. <http://hdl.handle.net/2027.42/41804> | en_US |
dc.identifier.issn | 0003-6994 | en_US |
dc.identifier.issn | 1573-1987 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/41804 | |
dc.description.abstract | The feasibility of control of wall turbulence by high frequency spanwise oscillations is investigated by direct numerical simulations of a planar turbulent channel flow subjected either to an oscillatory spanwise crossflow or to the spanwise oscillatory motion of one of the channel walls. Periods of oscillation, T osc. + = T osc. u τ 2 / v , ranging from 25 to 500 were studied. For 25< T osc. + <200 production of turbulence is suppressed. The most effective suppression of turbulence occurs at T osc + =100, for which the overall turbulence production is reduced by 62% compared to the unperturbed channel and sustained turbulent drag reductions of 40% are obtained. The suppression of turbulence is due to a continual shift of the near wall streamwise vortices relative to the wall layer streaks, which in turn leads to a widening, merging and weakening of the wall layer streaks and an overall reduction in the turbulence production. The turbulence suppression mechanism observed in these studies opens up new possibilities for effective control of turbulence in wall-bounded flows. | en_US |
dc.format.extent | 295115 bytes | |
dc.format.extent | 3115 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.language.iso | en_US | |
dc.publisher | Kluwer Academic Publishers; Springer Science+Business Media | en_US |
dc.subject.other | Physics | en_US |
dc.subject.other | Mechanics | en_US |
dc.subject.other | Automotive and Aerospace Engineering, Traffic | en_US |
dc.subject.other | Turbulence Control | en_US |
dc.subject.other | Drag Reduction | en_US |
dc.subject.other | Boundary Layer Flows | en_US |
dc.title | Turbulence control in wall-bounded flows by spanwise oscillations | en_US |
dc.type | Article | en_US |
dc.subject.hlbsecondlevel | Science insert into Categories values (General) | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Department of Mechanical Engineering, The University of Michigan, 48109-2125, Ann Arbor, MI, USA | en_US |
dc.contributor.affiliationum | Department of Mechanical Engineering, The University of Michigan, 48109-2125, Ann Arbor, MI, USA | en_US |
dc.contributor.affiliationum | Department of Mechanical Engineering, The University of Michigan, 48109-2125, Ann Arbor, MI, USA | en_US |
dc.contributor.affiliationumcampus | Ann Arbor | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/41804/1/10494_2004_Article_BF01082552.pdf | en_US |
dc.identifier.doi | http://dx.doi.org/10.1007/BF01082552 | en_US |
dc.identifier.source | Applied Scientific Research | en_US |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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