Hysteresis of two-dimensional flows around a NACA0012 airfoil at Re=5000 and linear analyses of their mean flow.

•Hysteresis of periodic flow around a NACA0012 airfoil at moderate Reynolds number.•Identification of period-doubling solutions for moderate angles of attack.•Resolvent analysis of the time-averaged flow to characterize multiple periodic solutions.•Identification of multiple peaks of energy at frequencies.