Experimental investigation on mixing time analysis of jet mixer-a review.

Jet mixing plays a vital role in mixing of fluids in process industry. Conventional mixing is equipped with impellers which are costlier and requires periodic maintenance compared to Jet mixers. Researchers have carried out the investigation of mixing nozzle by varying the parameters which influences the mixing time are jet velocity, nozzle diameter and tank height, jet Reynolds number and power consumption. Recently CFD is used to overcome the experimental limitations for design of jet mixed tanks. For Newtonian and non-Newtonian fluids, jet position which lies 30 cm above from the bottom of the tank and the nozzle diameter having 11% active area (10mm diameter) shows shortest mixing time. At a given level of power consumption, an increase in nozzle diameter increases the mixing time. The optimum nozzle diameter and jet position is not having a fixed value but it varies with tank geometry. T-jet mixers for different geometrical parameters using Planar Laser Induced Fluorescence (PLIF), numerical simulation of jet mixing enhancement using rectangular control jets, Flocculation process to remove turbidity, particle image velocimetry (PIV) and hot wire anemometers for studying coaxial jets parameters such as vorticity, stream wise velocity etc are the major techniques used by researchers to study the mixing time analysis for jet mixer. [ABSTRACT FROM AUTHOR]