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Modelling roughness and receptivity in three-dimensional boundary layers
KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.
KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.
KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0002-5913-5431
KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0002-4346-4732
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2011 (English)In: 7th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2011, International Symposium on Turbulence and Shear Flow Phenomena, TSFP , 2011, p. 1-6Conference paper, Published paper (Refereed)
Abstract [en]

The receptivity of a swept-wing boundary layer to localised surface roughness is studied by means of direct numerical simulations (DNS). The flow case considered is meant to model wind tunnel experiments performed at the Arizona State University by Saric & coworkers. The receptivity amplitude of the crossflow disturbances predicted by the DNS is 40% of that measured in the experiments. The DNS results are then used to evaluate the performance of different receptivity models based on either the parabolised stability equations or the finite Reynolds number theory (FRNT). In general it is found that receptivity amplitudes are well predicted for micron sized roughness elements if non-parallel effects are accounted for. 

Place, publisher, year, edition, pages
International Symposium on Turbulence and Shear Flow Phenomena, TSFP , 2011. p. 1-6
Keywords [en]
Atmospheric thermodynamics, Boundary layers, Number theory, Reynolds number, Surface roughness, Swept wings, Turbulence, Wind tunnels, Arizona state university, Finite Reynolds number, Receptivity model, Roughness elements, Stability equations, Swept-wing boundary layers, Three-dimensional boundary layers, Wind tunnel experiment, Shear flow
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-237217Scopus ID: 2-s2.0-85048542405OAI: oai:DiVA.org:kth-237217DiVA, id: diva2:1259717
Conference
7th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2011; Ottawa Convention Centre Ottawa; Canada; 28 July 2011 through 31 July 2011
Note

QC 20181030

Available from: 2018-10-30 Created: 2018-10-30 Last updated: 2018-10-30Bibliographically approved

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Tempelmann, DavidSchrader, L. -UHanifi, ArdeshirBrandt, LucaHenningson, Dan S.

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Linné Flow Center, FLOWMechanicsSeRC - Swedish e-Science Research Centre
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