Abstract Scope |
Binder jetting is an emerging additive manufacturing approach that attracts rising attention in recent years. The part-building process in binder jetting is directly affected by the interaction between binder droplet and powder bed. In this work, a fluid-solid coupling model is developed. The spattering and agglomeration behaviors of particles and their effects on the droplet are simulated and analyzed. The validity of this model is proven by validating simulation results against theoretical analysis and experimental results in the literature. Additionally, according to simulation results, the movement of the agglomerates after droplet impinging plays an important role in printing dimensional accuracy. This model is applicable for printing parametric studies with different binder droplets, powder, and process parameters. |