Numerical investigation of turbulent flow behavior of sand particles in core shooting process

Abstract

The core shooting process is the most widely used technology on sand core making and plays an important role on the quality of sand cores. However, the core shooting process has a complexity flow behavior of sand particles. In the current work, a computational fluid dynamics model- two-fluid model with incorporating the kinetic theory was adopted to investigate the hydrodynamic flow behavior of sand particles in sand shooting process. A comparison between laminar and turbulence model was made. The simulation results indicate that the turbulent flow has a significant effect on sand particles flow. The fluctuation of kinetic energy contributes to turbulent flow has a great effect on the sand volume distribution. A difference of sand volume fraction between wall and center of sand box occurs in turbulence model. The variation of solid velocity is nearly the same in both laminar and turbulence model.The variation of gas velocity has a more significant effect by different turbulence model than particle phase.