“…Figures 7 and 8 show ω 0 (X) and α 0 (X) for the base flowsq 2D andq 3D , respectively. In line with the analyses of the baseline LSB flows q 0 (Rodríguez, Gennaro & Juniper 2013a), the spanwise-average bifurcated flowsq 2D are found to be only convectively unstable. In contrast, the three-dimensional flowsq 3D present regions of absolute instability localized in the downstream part of the recirculation region.…”