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Self-similar transport of inertial particles in a turbulent boundary laye
KTH, School of Engineering Sciences (SCI), Mechanics, Stability, Transition and Control. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0002-9172-6311
KTH, School of Engineering Sciences (SCI), Mechanics, Stability, Transition and Control. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0001-9627-5903
KTH, School of Engineering Sciences (SCI), Mechanics, Stability, Transition and Control. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.
KTH, School of Engineering Sciences (SCI), Mechanics, Stability, Transition and Control. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.
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2012 (English)In: Journal of Fluid Mechanics, ISSN 0022-1120, E-ISSN 1469-7645, Vol. 706, 584-596 p.Article in journal (Refereed) Published
Abstract [en]

Results are presented from a direct numerical simulation of a particle-laden spatially developing turbulent boundary layer up to Re-theta = 2500. The peculiar feature of a boundary-layer flow seeded with heavy particles is the variation of the local dimensionless parameters defining the fluid-particle interactions along the streamwise direction. Two different Stokes numbers can be defined, one using inner flow units and the other with outer units. Since these two Stokes numbers exhibit different decay rates in the streamwise direction, we find a decoupled particle dynamics between the inner and the outer region of the boundary layer. Preferential near-wall particle accumulation is similar to that observed in turbulent channel flow, while different behaviour characterizes the outer region. Here the concentration and the streamwise velocity profiles are found to be self-similar and to depend only on the local value of the outer Stokes number and the rescaled wall-normal distance. These new results are powerful in view of engineering and environmental applications and corresponding flow modelling.

Place, publisher, year, edition, pages
2012. Vol. 706, 584-596 p.
National Category
Other Mechanical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-103370DOI: 10.1017/jfm.2012.290ISI: 000308470800026Scopus ID: 2-s2.0-84871505899OAI: oai:DiVA.org:kth-103370DiVA: diva2:561408
Funder
Swedish e‐Science Research Center
Note

QC 20121018

Available from: 2012-10-18 Created: 2012-10-11 Last updated: 2017-12-07Bibliographically approved

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Sardina, GaetanoSchlatter, PhilippBrandt, LucaHenningson, Dan Stafan

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Sardina, GaetanoSchlatter, PhilippPicano, FrancescoCasciola, CarloBrandt, LucaHenningson, Dan Stafan
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Stability, Transition and ControlLinné Flow Center, FLOW
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