The following papers have been accepted but have not been finalized (proof reading) yet.
«« Back

Computational Fluid Dynamics Simulation on Particulate Distribution in Gyro Casting for the Manufacture of Al/SiC Particulate Metal Matrix Composite
Author(s): Abdul Samad P A, Shalij P R, Ramesh A, Mubarak A K
Keywords: Gyro casting, Stir casting, Computational fluid dynamics, Mixing power, Grid independence study, Mixing index
The enhanced specific strength of SiC Particulate Metal Matrix Composites (PMMC) has been the contributing major factor which helps finding applications in the aerospace and automotive industries. Uniform distribution of the particulates in PMMC controls the attainment of better mechanical properties. The most accepted method for producing such a composite is stir casting in which the homogeneity of particulate reinforcement is a significant challenge. This research work proposes a new method for mixing the particulate reinforcement with the liquid and semi-solid aluminium matrix to ensure a uniform mix of the particulates using a gyro shaker. Gyro shaker is a dual rotation mixer commonly used for mixing high viscous fluids. It rotates about two mutually perpendicular axes which helps in thoroughly mixing of the ingredients. Computational Fluid Dynamics (CFD) simulation model of the mixing device was developed in finding the mixing performance while mixing SiC particulates with glycerol. The results of the simulation were also validated by experimentation. Analogue fluid simulation of gyro casting was carried out using water and glycerol/water mixture which are having closer value of viscosity as that of liquid aluminium and semi-solid aluminium. The distribution of the SiC particulates obtained from simulation was compared with stir casting simulations.