Numerical Simulation of Fluid Behavior and Particle Dispersion of Particle Reinforced Magnesium Matrix Composites
The simulation of internal flow field and variation characteristics in the crucible was carried out by finite ele-ment under action of various agitator angles(30°,45°,60°,90°).The k-ε turbulence model and Euler-Euler multi-phase flow model were established to analyze the vortex distribution law in the crucible,and dispersion of simulated particle was verified.The results indicate that the flow field in the crucible with straight agitator is fast,which is divided into two circulation regions(double loop flow type)by impeller stirring,and the confusion degree is low,inhibiting the dispersion effect of particles.The internal rotation of oblique agitator surface is obvious with a high vector confusion and efficiency of particle dispersion in the first stage.In addition,there exists axial flow in the crucible with oblique agi-tator,which can form an integrated circulation region(single loop flow type),leading to larger flow region of particles and desirable dispersion.
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