Numerical analysis of the effect of turbulence on particle agglomeration

Abstract

The turbulent agglomeration characteristics of a mechanical elements were investigated by numerical simulation using the SST k-ω model. The vorticity field, turbulent dissipation rate and pressure drop in the flow field were obtained. The results show the bluff body flow phenomenon occurs when the incoming flow passes through the spoiler element. On the back of the element, a periodic vortex similar to Karman vortex street is formed. After the airflow passes through the turbulence element, the turbulent dissipation rate in the main flow area is higher, and the particle agglomeration effect is significant. In the vortex street period, due to the viscous dissipation, the dissipation rate decreases exponentially with the increase of the propagation distance, and the agglomeration effect decreases. Due to the resistance of the turbulence element, the pressure drop between the inlet and outlet is up to 143pa, resulting in a large pressure loss.