Fig. 6
a The pressures at 26 axial locations (0.65 m ≤ z ≤ 1.15 m) in EX10, EX15, IN10 and IN15 along the flow direction (z-axis); the legend levels in these cases are scaled to show the vortex cores in each case, b streamlines at 26 axial locations (0.65 m ≤ z ≤ 0.85 m) in EX10, EX15, IN10 and IN15, c variation in absolute vorticity flux, JABS, in six PBRs along the flow direction