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The impact of pressure gradient history on flow structures in high Reynolds number rough wall turbulence

The impact of pressure gradient history on flow structures in high Reynolds number rough wall turbulence
The impact of pressure gradient history on flow structures in high Reynolds number rough wall turbulence
High Reynolds number experiments are conducted over a rough wall with strong non-equilibrium pressure gradients. The boundary layer is exposed to different pressure gradient histories via an aerofoil mounted above the boundary layer. Particle image velocity (PIV) allows for the flow development from one chord upstream of the leading edge to one chord downstream of the trailing edge to be captured (3.75 m or ≈ 22
Pressure gradients, Roughness, Turbulent boundary layers
0142-727X
Preskett, T.
6d4ea9c7-3f9d-4394-8e15-eb1e50dc829b
Ganapathisubramani, B.
5e69099f-2f39-4fdd-8a85-3ac906827052
Preskett, T.
6d4ea9c7-3f9d-4394-8e15-eb1e50dc829b
Ganapathisubramani, B.
5e69099f-2f39-4fdd-8a85-3ac906827052

Preskett, T. and Ganapathisubramani, B. (2025) The impact of pressure gradient history on flow structures in high Reynolds number rough wall turbulence. International Journal of Heat and Fluid Flow, 116, [109942]. (doi:10.1016/j.ijheatfluidflow.2025.109942).

Record type: Article

Abstract

High Reynolds number experiments are conducted over a rough wall with strong non-equilibrium pressure gradients. The boundary layer is exposed to different pressure gradient histories via an aerofoil mounted above the boundary layer. Particle image velocity (PIV) allows for the flow development from one chord upstream of the leading edge to one chord downstream of the trailing edge to be captured (3.75 m or ≈ 22

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Accepted/In Press date: 12 June 2025
e-pub ahead of print date: 25 July 2025
Published date: 25 July 2025
Keywords: Pressure gradients, Roughness, Turbulent boundary layers

Identifiers

Local EPrints ID: 504066
URI: http://eprints.soton.ac.uk/id/eprint/504066
DOI: doi:10.1016/j.ijheatfluidflow.2025.109942
ISSN: 0142-727X
PURE UUID: ac1c1a5f-988c-4ceb-83df-1c9b1dfb8de7
ORCID for T. Preskett: ORCID iD orcid.org/0000-0001-9203-1266
ORCID for B. Ganapathisubramani: ORCID iD orcid.org/0000-0001-9817-0486

Catalogue record

Date deposited: 22 Aug 2025 16:35
Last modified: 18 Oct 2025 02:04

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Contributors

Author: T. Preskett ORCID iD
Author: B. Ganapathisubramani ORCID iD

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