Flow visualization and hot-wire anemometry were used to investigate the isothermal velocity field in a rectangular channel containing a single cylindrical rod, focussing on the gap region between the rod and a plane wall. Measurements reported in this pap

In Part 1, we have presented the Reynolds-averaged turbulence characteristics of iso-thermal flow in a rectangular channel containing a cylindrical rod such that it forms a narrow gap with a plane channel wall. Part 2 focuses on conditionally sampled measurements of the phase-averaged characteristics of the coherent vortical structures that produce flow pulsations across the gap and formulates a tentative physical model of their typical shapes.