Effects of pressure gradient histories on skin friction and mean flow of high Reynolds number turbulent boundary layers over smooth and rough walls
Effects of pressure gradient histories on skin friction and mean flow of high Reynolds number turbulent boundary layers over smooth and rough walls
Experiments are conducted over smooth and rough walls to explore the influence of pressure gradient histories on skin friction and mean flow of turbulent boundary layers. Different pressure gradient histories are imposed on the boundary layer through an aerofoil mounted in the freestream. Hot-wire measurements are taken at different freestream velocities downstream of the
aerofoil where the flow has locally recovered to zero pressure gradient but retains the history effects. Direct skin friction measurements are also made using oil film interferometry for smooth walls and a floating element drag balance for rough walls. The friction Reynolds number,
turbulent boundary layers
Preskett, T.
6d4ea9c7-3f9d-4394-8e15-eb1e50dc829b
Virgilio, M.
059fcc1a-721e-4d48-9933-e7f4ddc82fde
Jaiswal, P.
eca47561-3abe-4b48-b914-9b274eb9765a
Ganapathisubramani, Bharath
5e69099f-2f39-4fdd-8a85-3ac906827052
9 May 2025
Preskett, T.
6d4ea9c7-3f9d-4394-8e15-eb1e50dc829b
Virgilio, M.
059fcc1a-721e-4d48-9933-e7f4ddc82fde
Jaiswal, P.
eca47561-3abe-4b48-b914-9b274eb9765a
Ganapathisubramani, Bharath
5e69099f-2f39-4fdd-8a85-3ac906827052
Preskett, T., Virgilio, M., Jaiswal, P. and Ganapathisubramani, Bharath
(2025)
Effects of pressure gradient histories on skin friction and mean flow of high Reynolds number turbulent boundary layers over smooth and rough walls.
Fluid Dynamics, 1010, [A30].
(doi:10.1017/jfm.2025.320).
Abstract
Experiments are conducted over smooth and rough walls to explore the influence of pressure gradient histories on skin friction and mean flow of turbulent boundary layers. Different pressure gradient histories are imposed on the boundary layer through an aerofoil mounted in the freestream. Hot-wire measurements are taken at different freestream velocities downstream of the
aerofoil where the flow has locally recovered to zero pressure gradient but retains the history effects. Direct skin friction measurements are also made using oil film interferometry for smooth walls and a floating element drag balance for rough walls. The friction Reynolds number,
Text
Hot_wire_JFM___Feb_2024__Pure_
More information
Accepted/In Press date: 17 March 2025
Published date: 9 May 2025
Keywords:
turbulent boundary layers
Identifiers
Local EPrints ID: 500558
URI: http://eprints.soton.ac.uk/id/eprint/500558
ISSN: 0015-4628
PURE UUID: 287624af-eca8-4e70-9511-41956b9c26cf
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Date deposited: 06 May 2025 16:39
Last modified: 28 Aug 2025 04:01
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Contributors
Author:
T. Preskett
Author:
M. Virgilio
Author:
P. Jaiswal
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