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Experiments in Fluids

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01.08.2021 | Research Article

Spatial resolution effects on measurements in a rough wall turbulent boundary layer

verfasst von: Farzin Ghanadi, Lyazid Djenidi

Erschienen in: Experiments in Fluids | Ausgabe 8/2021

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Abstract

Hot-wire probe resolution effects on the measurements of the streamwise velocity fluctuation are assessed in a two-dimensional fully rough wall turbulent boundary layer (TBL). Various viscous-scaled wire lengths \(l^+\) ranging from 24 to 168 are used. It is found that, in contrast to results observed in smooth wall TBLs measurements, there is no effect of the wire length on the measurements. Accordingly, no corrections similar to those required for smooth wall TBLs are necessary for fully rough TBLs. In fact, the application of such corrections to fully rough wall TBL measurements can lead to erroneous near-wall behaviour of the variance of the longitudinal velocity component.

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Vorheriger Artikel Investigation of the steady and unsteady forces acting on a pair of circular cylinders in crossflow up to ultra-high Reynolds numbers

Nächster Artikel Study of Reynolds number effects on the aerodynamics of a moderately thick airfoil using a high-pressure wind tunnel

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Titel: Spatial resolution effects on measurements in a rough wall turbulent boundary layer
verfasst von: Farzin Ghanadi
Lyazid Djenidi
Publikationsdatum: 01.08.2021
Verlag: Springer Berlin Heidelberg
Erschienen in: Experiments in Fluids / Ausgabe 8/2021
Print ISSN: 0723-4864
Elektronische ISSN: 1432-1114
DOI: https://doi.org/10.1007/s00348-021-03272-x

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