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In this study, we investigate the hydrodynamics of polymer‐induced drag reduction (DR) in horizontal turbulent pipe flows. We provide spatiotemporally resolved information of velocity and its gradients obtained with particle image velocimetry measurements in solutions of water with dissolved polyethylene oxide of three different molecular weights (MWs), at various dilute concentrations and with flow...
Optical laser-based techniques and an extensive data analysis methodology have been developed to acquire flow and separation characteristics of concentrated liquid–liquid dispersions. A helical static mixer was used at the inlet of an acrylic 4 m long horizontal pipe to actuate the dispersed flows at low mixture velocities. The organic (913 kg m$$^{-3}$$ -3 , 0.0046 Pa s) and aqueous phases (1146 kg m$$^{-3}$$...
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