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Adverse-Pressure-Gradient Effects on Turbulent Boundary Layers: Statistics and Flow-Field Organization

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dc.affiliation.dptoUC3M. Departamento de Ingeniería Aeroespaciales
dc.affiliation.grupoinvUC3M. Grupo de Investigación: Ingeniería Aeroespaciales
dc.contributor.authorSanmiguel Vila, Carlos
dc.contributor.authorOrlu, Ramis
dc.contributor.authorVinuesa, Ricardo
dc.contributor.authorSchlatter, Philipp Christian
dc.contributor.authorIaniro, Andrea
dc.contributor.authorDiscetti, Stefano
dc.contributor.funderEuropean Commissionen
dc.contributor.funderMinisterio de Economía y Competitividad (España)es
dc.date.accessioned2021-02-22T09:38:04Z
dc.date.available2021-02-22T09:38:04Z
dc.date.issued2017-12-01
dc.description.abstractThis manuscripts presents a study on adverse-pressure-gradient turbulent boundary layers under different Reynolds-number and pressure-gradient conditions. In this work we performed Particle Image Velocimetry (PIV) measurements supplemented with Large-Eddy Simulations in order to have a dataset covering a range of displacement-thickness-based Reynolds-number 2300 34000 and values of the Clauser pressure-gradient parameter beta up to 2.4. The spatial resolution limits of PIV for the estimation of turbulence statistics have been overcome via ensemble-based approaches. A comparison between ensemble-correlation and ensemble Particle Tracking Velocimetry was carried out to assess the uncertainty of the two methods. The effects of beta, R e and of the pressure-gradient history on turbulence statistics were assessed. A modal analysis via Proper Orthogonal Decomposition was carried out on the flow fields and showed that about 20% of the energy contribution corresponds to the first mode, while 40% of the turbulent kinetic energy corresponds to the first four modes with no appreciable dependence on beta and R e within the investigated range. The topology of the spatial modes shows a dependence on the Reynolds number and on the pressure-gradient strength, in line with the results obtained from the analysis of the turbulence statistics. The contribution of the modes to the Reynolds stresses and the turbulence production was assessed using a truncated low-order reconstruction with progressively larger number of modes. It is shown that the outer peaks in the Reynolds-stress profiles are mostly due to large-scale structures in the outer part of the boundary layer.en
dc.description.sponsorshipCSV acknowledges the financial support from Universidad Carlos III de Madrid within the program “Ayudas para la Movilidad del Programa Propio de Investigación”. RÖ, RV and PS acknowledge the financial support from the Swedish Research Council (VR) and the Knut and Alice Wallenberg Foundation. CSV, SD and AI were partially supported by the COTURB project (Coherent Structures in Wall-bounded Turbulence), funded by the European Research Council (ERC), under grant ERC-2014.AdG-669505. CSV, SD and AI have been partially supported by Grant DPI2016-79401-R funded by the Spanish State Research Agency (SRA) and European Regional Development Fund (ERDF).en
dc.format.extent24
dc.identifier.bibliographicCitationSanmiguel Vila, C., Örlü, R., Vinuesa, R., Schlatter, P., Ianiro, A. y Discetti, S.(2017). Adverse-Pressure-Gradient Effects on Turbulent Boundary Layers: Statistics and Flow-Field Organization. Flow Turbulence Combust, 99, pp. 589–612.en
dc.identifier.doihttps://doi.org/10.1007/s10494-017-9869-z
dc.identifier.issn1386-6184
dc.identifier.publicationfirstpage589
dc.identifier.publicationissue3-4
dc.identifier.publicationlastpage612
dc.identifier.publicationtitleFlow, Turbulence and Combustionen
dc.identifier.publicationvolume99
dc.identifier.urihttps://hdl.handle.net/10016/31980
dc.identifier.uxxiAR/0000020859
dc.language.isoengen
dc.publisherSpringeren
dc.relation.projectIDGobierno de España. DPI2016-79401-Res
dc.relation.projectIDinfo:eu-repo/grantAgreement/ERC/2014/ADG/669505en
dc.rights© 2017, The Author(s).en
dc.rightsAtribución 3.0 España*
dc.rights.accessRightsopen accessen
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/es/*
dc.subject.ecienciaAeronáuticaes
dc.subject.otherPTVen
dc.subject.otherPODen
dc.subject.otherPIVen
dc.subject.otherWall turbulenceen
dc.titleAdverse-Pressure-Gradient Effects on Turbulent Boundary Layers: Statistics and Flow-Field Organizationen
dc.typeresearch article*
dc.type.hasVersionAM*
dspace.entity.typePublication
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