Experimental study of the stratified wake of a sphere: Core Turbulence
ORAL
Abstract
Wakes in density-stratified fluids radiate internal waves due to the random turbulent motions in the core of the wake (Meunier et al. JFM 2018; Rowe, Diamessis, and Zhou JFM 2020). To investigate the relationship between the core turbulent wake and the resulting internal waves, experiments with a dimpled sphere at Reynolds number of ~100,000 and Froude number of ~64 were conducted using. The experiments extend prior unstratified wake results of Saunders et al. (PRF 2020; Exp. Fluids 2022) to the stratified regime. This presentation will focus on the core turbulent wake immediately behind the sphere.
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Publication: Saunders, D.C., Britt, J.A. & Wunsch, S. Decay of the drag wake of a sphere at Reynolds number 10^5. Exp Fluids 63, 71 (2022). https://doi.org/10.1007/s00348-022-03414-9<br><br>Saunders, D.C., Frederick, G., Drivas, T.D., Wunsch, S. Self-similar decay of the drag wake of a dimpled sphere. Phys. Rev. Fluids 5, 124607. (2020). https://doi.org/10.1103/PhysRevFluids.5.124607
Presenters
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Nerion Zekaj
University of North Carolina at Chapel Hill
Authors
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Nerion Zekaj
University of North Carolina at Chapel Hill
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Maddie Samuell
John Hopkins University
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Curtis D Saunders
John Hopkins University
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Scott E Wunsch
Johns Hopkins University