“…• With respect to what found for other kind of obstacles when impinged by a high-pressure jet (Colombini et al, 2020a, Colombini et al, 2020bColombini et al, 2021a;Colombini et al, 2021b;Colombini et al, 2021c), the cylindrical obstacle (be it oriented horizontally or vertically) has the effect of decreasing the jet maximum extent instead of increasing it; at most, the impinging jet results to have similar length of the free jet case;…”