Bulletin of the American Physical Society
76th Annual Meeting of the Division of Fluid Dynamics
Sunday–Tuesday, November 19–21, 2023; Washington, DC
Session X42: Turbulence: Wall-Bounded VI
8:00 AM–10:10 AM,
Tuesday, November 21, 2023
Room: 207A
Chair: Sergio Hoyas, Universitat Politecnica de Valencia
Abstract: X42.00007 : Turbulent-wall pressure fluctuations in permeable-rough surfaces*
9:18 AM–9:31 AM
Presenter:
Dea D Wangsawijaya
(University of Southampton)
Authors:
Dea D Wangsawijaya
(University of Southampton)
Prateek Jaiswal
(Université de Sherbrooke)
Bharathram Ganapathisubramani
(Univ of Southampton)
In this study, we aim to explore and decouple the effects of permeability and roughness in the flow and wall-pressure statistics. Simultaneous hot-wire anemometry and microphone measurements are conducted inside a boundary layer wind tunnel over a wide range of Reynolds numbers, where TBLs develop over various porous and rough walls (with a systematic variation of the roughness effects). Present results suggest that the footprints of permeability and roughness are apparent in the energy spectra of turbulent fluctuation for isolated permeable and rough walls. Explorations of this phenomenon in porous-rough combinations, the coherence between turbulence and wall-pressure statistics, as well as decoupling of roughness and permeability effects, will follow.
*1. EPSRC (grant no: EP/S013296/1)2. European Office for Airforce Research and Development (grant no: FA9550-19-1-7022)3. UKRI Postdoc Guarantee (grant no: EP/X032590/1)
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