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Theoretical and Applied Mechanics Letters
Model illustration and the typical flow pattern of the wake flow revealed by Hydrogen bubble timeline visualization, with the dashed rectangle indicating the two PIV-measured regions
First order statistics of the wake flow, colormap shows the distribution of time-averaged spanwise vorticity and solid line shows mean streamline deduced from time-averaged velocity field
Dynamic eigenvalue characteristics in region I. (a) DMD spectrum in the form of , each dot corresponds to one mode (the blue circle will be explained in the text); (b) Coherence measure of each mode, the phase velocity is normalized by 2π to reveal the frequency information (the dashed straight line will be explained in the text)
Spatial pattern of the dynamic mode at the frequency of in Region I. (a)-(c) colormap shows distribution of u, v and components individually, quiver represents the velocity vector (only the real part is shown, the same as follows); (d) time variation of the mode coefficient ; (e) power spectrum of
Spatial pattern of the dynamic mode at the frequency of , , and in both Region I and Region II. for simplicity, only the v component in combination of velocity vector is shown
Correlation between frequency and wavelength of the four most dominant dynamic modes
Frequency, wavelength and convection speed of the four most dominant dynamic modes
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