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Feature Extraction from Turbulent Channel Flow of Moderate Reynolds Number via Composite DMD Analysis

In this contribution, we described a Dynamic Mode Decomposition (DMD) analysis of a turbulent channel flow database at a moderate friction Reynolds number Reτ ≈ 950. More specifically, a composite-based DMD analysis was conducted, employing hybrid snapshots assembled by skin friction Cf (tk ) and either instantaneous Reynolds stress (u′v′(x;tk)) or streamwise velocity fluctuation (u′;xtk)) fields.