The chaotic flow past two side-by-side square cylinders has two positive Lyapunov exponents with covariant Lyapunov vectors indicating near-wake and downstream instabilities; global linear stability analysis incorrectly predicts neutrality for an unstable mode.
Structural sensitivity of the first instability of the cylinder wake
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Lyapunov stability analysis of the chaotic flow past two square cylinders
The chaotic flow past two side-by-side square cylinders has two positive Lyapunov exponents with covariant Lyapunov vectors indicating near-wake and downstream instabilities; global linear stability analysis incorrectly predicts neutrality for an unstable mode.