77th Annual Meeting of the APS Division of Fluid Dynamics (November 24, 2024 — November 26, 2024)

P2678624: Coherent structures in finite wing wakes

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Authors

• Laura Victoria Rolandi, University of California, Los Angeles
• Luke Smith, University of California, Los Angeles
• Kunihiko Taira, University of California, Los Angeles

DOI: https://doi.org/10.1103/APS.DFD.2024.GFM.P2678624

A coherent modal structure is a distinct pattern characterized by specific spatial and temporal coherence. These structures are generally identified using modal analysis techniques, like resolvent analysis employed in our study, which decomposes complex flow fields into simpler, orthogonal modes that capture the flow's dominant dynamics. This poster shows the most energetic response structure of the separated flow around a NACA0012 finite wing of aspect-ratio 4 at 14-degrees angle of attack. The structure captures the vortex roll-up of the separated shear layer, and we illustrate how it changes with the Reynolds number.