3/9/2023 0 Comments Magmasoft booleanSimulation results also show that the generation of vortex flows inside the filling system is beneficial in reducing free surface turbulence, which results in less air entrainment and oxide inclusion formation during mold filling. In addition, using an offset pouring basin with a stopper and pressurizing the gating system further reduces the volume of entrained air. Results indicate that reducing the head height and pouring time, and the addition of a nozzle extension significantly reduces the air entrainment. Simulations are performed investigating the air entrainment characteristics of castings filled without a gating system, and with bottom-gated and side-gated filling systems. In this study, the effect of more complex pouring conditions and gating system design on air entrainment is examined. In the course of validating the model with experimental data for plunging liquid jets, it was shown that the air entrainment rate during mold filling depends fundamentally on the velocity and diameter of the jet formed by the pouring stream. A model was recently developed by the authors to predict the volumetric air entrainment during pouring of metal castings. Air entrainment during mold filling is a major source of oxide inclusion formation in metal casting.
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