Influence of Injection Angle in a Jet Mixer

Nowadays, most of the mixers are going to be replaced by jet mixers due to the some benefits. So investigation of the effective parameters is important in these mixers. In this article, the effect of nozzle diameter on different flow rates and effect of angle of jet injection were studied experimentally. The results showed that for a cylindrical tank with the shape factor of h/D=1 and injection from center of its roof in a constant flow rate as the nozzle diameter was increased, the mixing time was increased but the rate of increasing was decreased as flow rate was increased. Moreover the results showed that mixing time was also depended on angle of injection. Injection whit 20 and 30 degree from center of roof had the longest jet length. But injection angle 10 and 45 degree had the least mixing times. Some disagreement with the results of mixing time due to the jet length was observed when compared with those reported in the literature.