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EPTT 2024
14th Spring School on Transition and Turbulence
Resolvent-based analysis of near-wall coherent structures in turbulent boundary layer
Submission Author:
Felipe Pinheiro , SP , Brazil
Co-Authors:
Felipe Pinheiro, Leandra Abreu
Presenter: Felipe Pinheiro
doi://10.26678/ABCM.EPTT2024.EPT24-0057
Abstract
Resolvent-based analysis combined with Spectral Proper Orthogonal Decomposition (SPOD) provides a robust framework for understanding near-wall coherent structures in turbulent boundary layers. This study focuses on the low- and high-frequency interactions that shape the dynamics of these structures. Resolvent analysis, grounded in linearized Navier-Stokes equations, identifies key flow structures by treating nonlinear terms as a forcing mechanism, while SPOD decomposes the turbulent flow into energy-optimal modes. By applying these methods to boundary layer data, we uncover dominant coherent structures responsible for energy transfer and momentum transport. The results demonstrate how resolvent modes correlate with SPOD modes, offering insights into the spatiotemporal behavior of near-wall turbulence. These findings enhance our understanding of wall-bounded turbulence mechanisms and offer potential pathways for turbulence control strategies.
Keywords
Resolvent Analysis, Turbulent Boundary Layer, SPOD, DNS
