Abstract:

Flow field in a stirred tank was divided into chaotic and isolated mixing zones.To enhance mixing efficiency and reduce energy consumption of fluid mixing, it was an alternative way to control the flow field structure.With the aid of image processing software, fractal dimension of air-water mixing system was investigated in the eccentric air-jet stirred tank with double mechanical impeller.The results showed that the fractal dimension of flow structure was affected by the mechanical agitation speed and air flow rate, and it could be controlled by eccentric jet and the chaotic mixing performance could be enhanced.Fluid mixing performance could be improved by controlling coherent structure with increased agitation speed.