Numerical investigation of lagrangian coherent structures in steady rotation vortex shedding control

In this paper, vortex shedding and suppression are numerically investigated as autonomous non-autonomous dynamical systems respectively. Lagrangian coherent structures (LCSs) used a numerical tool to analyze these systems. These ridges of Finite time Lyapunov exponent (FTLE) which act material surfaces that transport barriers within the flow. Initially, utility LCSs is explored for revealing Finally, an active flow control method, steady rotation applied system with different speed ratios mitigate magnitude. This will eventually turn into system. Fixed saddle points, separation profiles essentially unstable variant manifolds attached cylinder wall evolution other analyzed reference LCSs. It revealed ratio 2.1 fully suppresses von Karman street at Reynolds number 100 turns fixed points time-invariant manifolds.