Research on evaluation index of flocculation effect based on the CFD simulation method

A new evaluation index of flocculation effect - the vortex velocity gradient G´ was introduced in this paper, on the basis of currently existing evaluation indexes of flocculation effect -turbulent kinetic energy k and effective energy consumption ε; then combined three indexes the CFD numerical simulation of lattice flocculent pond was conducted. The results indicate that the numerical calculation of k, ε, and G´ can reasonably explain the impact of lattice flocculent pond orifice size on the flocculation effect, and meanwhile verify the better applicability when combined k, ε, and G´ together as the CFD numerical simulation evaluation indexes of flocculation effect.