Large-eddy simulation of turbulent flow over a parametric set of bumps

dc.contributor.author Matai, Racheet
dc.contributor.author Durbin, Paul
dc.contributor.author Durbin, Paul
dc.contributor.department Aerospace Engineering
dc.date 2019-04-24T13:48:56.000
dc.date.accessioned 2020-06-29T22:45:33Z
dc.date.available 2020-06-29T22:45:33Z
dc.date.copyright Tue Jan 01 00:00:00 UTC 2019
dc.date.embargo 2019-09-13
dc.date.issued 2019-05-10
dc.description.abstract <p>Turbulent flow over a series of increasingly high, two-dimensional bumps is studied by well-resolved large-eddy simulation. The mean flow and Reynolds stresses for the lowest bump are in good agreement with experimental data. The flow encounters a favourable pressure gradient over the windward side of the bump, but does not relaminarize, as is evident from near-wall fluctuations. A patch of high turbulent kinetic energy forms in the lee of the bump and extends into the wake. It originates near the surface, before flow separation, and has a significant influence on flow development. The highest bumps create a small separation bubble, whereas flow over the lowest bump does not separate. The log law is absent over the entire bump, evidencing strong disequilibrium. This dataset was created for data-driven modelling. An optimization method is used to extract fields of variables that are used in turbulence closure models. From this, it is shown how these models fail to correctly predict the behaviour of these variables near to the surface. The discrepancies extend further away from the wall in the adverse pressure gradient and recovery regions than in the favourable pressure gradient region.</p>
dc.description.comments <p>This is a manuscript of an article published as Matai, Racheet, and Paul Durbin. "Large-eddy simulation of turbulent flow over a parametric set of bumps." <em>Journal of Fluid Mechanics</em> 866 (2019): 503-525. DOI: <a href="http://dx.doi.org/10.1017/jfm.2019.80" target="_blank">10.1017/jfm.2019.80</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/aere_pubs/140/
dc.identifier.articleid 1141
dc.identifier.contextkey 14077780
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath aere_pubs/140
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/1986
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/aere_pubs/140/2019_DurbinPaul_LargeEddy.pdf|||Fri Jan 14 20:11:57 UTC 2022
dc.source.uri 10.1017/jfm.2019.80
dc.subject.disciplines Aerodynamics and Fluid Mechanics
dc.subject.disciplines Aerospace Engineering
dc.title Large-eddy simulation of turbulent flow over a parametric set of bumps
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
File
Original bundle
Now showing 1 - 1 of 1
Name:
2019_DurbinPaul_LargeEddy.pdf
Size:
3.45 MB
Format:
Adobe Portable Document Format
Description:
Collections