LES of spatially developing turbulent boundary layer over a concave surface

dc.contributor.author Arolla, Sunil
dc.contributor.author Durbin, Paul
dc.contributor.author Durbin, Paul
dc.contributor.department Aerospace Engineering
dc.date 2018-02-19T01:17:37.000
dc.date.accessioned 2020-06-29T22:45:15Z
dc.date.available 2020-06-29T22:45:15Z
dc.date.copyright Wed Jan 01 00:00:00 UTC 2014
dc.date.issued 2015-01-01
dc.description.abstract <p>We revisit the problem of a spatially developing turbulent boundary layer over a concave surface. Unlike previous investigations, we simulate the combined effects of streamline curvature as well as curvature-induced pressure gradients on the turbulence. Our focus is on investigating the response of the turbulent boundary layer to the sudden onset of curvature and the destabilising influence of concave surface in the presence of pressure gradients. This is of interest for evaluating the turbulence closure models. At the beginning of the curve, the momentum thickness Reynolds number is 1520 and the ratio of the boundary layer thickness to the radius of curvature is δ0/<em>R</em> = 0.055. The radial profiles of the mean velocity and turbulence statistics at different locations along the concave surface are presented. Our recently proposed curvature-corrected Reynolds Averaged Navier-Stokes (RANS) model is assessed in an <em>a posteriori</em> sense and the improvements obtained over the base model are reported. From the large Eddy simulation (LES) results, it was found that the maximum influence of concave curvature is on the wall-normal component of the Reynolds stress. The budgets of wall-normal Reynolds stress also confirmed this observation. At the onset of curvature, the effect of adverse pressure gradient is found to be predominant. This decreases the skin friction levels below that in the flat section.</p>
dc.description.comments <p>This article is published as Arolla, Sunil K., and Paul A. Durbin. "LES of spatially developing turbulent boundary layer over a concave surface." Journal of Turbulence 16, no. 1 (2015): 81-99. <a href="http://dx.doi.org/10.1080" target="_blank">10.1080/14685248.2014.959126</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/aere_pubs/104/
dc.identifier.articleid 1104
dc.identifier.contextkey 10984597
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath aere_pubs/104
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/1946
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/aere_pubs/104/2015_Durbin_LESSpatially.pdf|||Fri Jan 14 18:20:18 UTC 2022
dc.source.uri 10.1080/14685248.2014.959126
dc.subject.disciplines Aerodynamics and Fluid Mechanics
dc.subject.disciplines Aerospace Engineering
dc.subject.keywords LES
dc.subject.keywords turbulence
dc.subject.keywords concave wall
dc.subject.keywords streamline curvature
dc.subject.keywords pressure gradients
dc.subject.keywords inflow generation
dc.subject.keywords RANS
dc.title LES of spatially developing turbulent boundary layer over a concave surface
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 3f74ce5e-8f72-4b32-9592-72cb91b67eb1
relation.isOrgUnitOfPublication 047b23ca-7bd7-4194-b084-c4181d33d95d
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