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dc.contributor.authorLucas, D
dc.contributor.authorCaulfield, CP
dc.contributor.authorKerswell, RR
dc.date.accessioned2019-03-08T00:30:33Z
dc.date.available2019-03-08T00:30:33Z
dc.date.issued2019
dc.identifier.issn0022-1120
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/290320
dc.description.abstractRecent research has shed light on the role of coherent structures in forming layers when stably stratified turbulence is forced with horizontal shear (Lucas, Caulfield & Kerswell, J. Fluid Mech., vol. 832, 2017, pp. 409-437). Here we extend our previous work to investigate the effect of rigid boundaries on the dynamics by studying stably-stratified plane Couette flow with gravity oriented in the spanwise direction. We observe near-wall layering and associated new mean flows in the form of large scale spanwise-flattened streamwise rolls. The layers exhibit the expected buoyancy scaling $l_z\sim U/N$ where $U$ is a typical horizontal velocity scale and $N$ the buoyancy frequency. We associate the new coherent structures with a stratified modification of the well-known large scale secondary flow in plane Couette and find that the possibility of the transition to sustained turbulence is controlled by the relative size of this buoyancy scale to the spanwise spacing of the streaks. We also investigate the influence on the transition to turbulence of the newly discovered linear instability in this system (Facchini et. al. 2018 arXiv:1711.11312).
dc.description.sponsorshipEPSRC
dc.publisherCambridge University Press (CUP)
dc.rightsAll Rights Reserved
dc.rights.urihttp://www.rioxx.net/licenses/all-rights-reserved
dc.titleLayer formation and relaminarisation in plane Couette flow with spanwise stratification
dc.typeArticle
prism.endingPage118
prism.publicationDate2019
prism.publicationNameJournal of Fluid Mechanics
prism.startingPage97
prism.volume868
dc.identifier.doi10.17863/CAM.37550
dcterms.dateAccepted2019-02-27
rioxxterms.versionofrecord10.1017/jfm.2019.192
rioxxterms.versionAM
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2019-06-10
dc.contributor.orcidCaulfield, Colm-cille [0000-0002-3170-9480]
dc.contributor.orcidKerswell, Richard [0000-0001-5460-5337]
dc.identifier.eissn1469-7645
dc.publisher.urlhttp://dx.doi.org/10.1017/jfm.2019.192
rioxxterms.typeJournal Article/Review
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/K034529/1)
cam.issuedOnline2019-04-10
datacite.issupplementedby.urlhttps://doi.org/10.17863/CAM.37838
cam.orpheus.successThu Jan 30 10:49:17 GMT 2020 - Embargo updated
rioxxterms.freetoread.startdate2019-12-10


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