We present an experimental study on the effects of polymer additives entrainment a circular water jet and their dependence concentration [Formula: see text] (in range 0–40 ppm) Weissenberg number Wi 2.0–85.6), at Reynolds Re = 7075. Extensive particle image velocimetry measurements were performed between 0 74 D ( is inner diameter pipe) downstream nozzle. Our results clearly show that polymer-l...