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dc.contributor.authorDadonau, Maksimen
dc.contributor.authorPartridge, JLen
dc.contributor.authorLinden, Paulen
dc.date.accessioned2020-01-10T13:55:47Z
dc.date.available2020-01-10T13:55:47Z
dc.date.issued2020-02-10en
dc.identifier.issn0022-1120
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/300732
dc.description.abstractWe investigate experimentally the effect of double diffusion in the salt-fingering configuration on entrainment in turbulent plumes. Plumes over a range of source buoyancy fluxes and source density ratios 𝜌 are examined. When the plumes are double diffusive ( 𝜌 ) the entrainment coefficient 𝛼 is not constant, with an up to 20 % reduction from the value found for single-diffusive plumes, that is, plumes with 𝜌 . The scale of reduction is found to be in direct relation to the source density ratio and is inversely related to the distance travelled by the plume, indicating that double-diffusive effects decrease as the plume evolves. We propose an explanation for the observed reduction in the entrainment coefficient on the basis of differential diffusion hindering large-scale engulfment at the edge of the plume.
dc.description.sponsorshipWe acknowledge funding from the EPSRC under the Programme Grant EP/K034529/1 ‘Mathematical Underpinnings of Stratified Turbulence’ (MUST), and from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme under grant no. 742480 ‘Stratified Turbulence And Mixing Processes’ (STAMP). M.D. is supported by the Gates Cambridge Scholarship.
dc.publisherCambridge University Press
dc.subjectplumesen
dc.subjectthermalsen
dc.subjectdouble-diffusive convectionen
dc.titleThe effect of double diffusion on entrainment in turbulent plumesen
dc.typeArticle
prism.numberA6en
prism.publicationDate2020en
prism.publicationNameJournal of Fluid Mechanicsen
prism.volume884en
dc.identifier.doi10.17863/CAM.47805
rioxxterms.versionofrecord10.1017/jfm.2019.925en
rioxxterms.versionAM*
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2020-02-10en
dc.contributor.orcidDadonau, Maksim [0000-0002-8688-2176]
dc.contributor.orcidLinden, Paul [0000-0002-8511-2241]
dc.identifier.eissn1469-7645
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idEuropean Commission Horizon 2020 (H2020) ERC (742480)
pubs.funder-project-idEPSRC (EP/K034529/1)
cam.issuedOnline2019-12-03en
cam.orpheus.successThu Jan 30 10:33:17 GMT 2020 - Embargo updated*
rioxxterms.freetoread.startdate2020-06-03


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