Implementation of computer simulation for modeling arragement of ceramic reinforcing particles during casting porcess of metal matrix composite

Computer simulations have been implemented for modelling arrangement of ceramic reinforcing particles during the casting process of aluminium matrix composite reinforced with ceramic particles. Numerical simulations have been carried out using the program Fluent 6.3 and procedures included in this program. In 2D system the Volume of Fluid approach (VOF) and enthalpy method have been applied for modelling the air-fluid free surface (and also volume fraction of particular continuous phases) and the solidification of the cast, respectively. The Discrete Phase Model (DPM) has been used to describe the behaviour of ceramic reinforcing particles. The methods included into this program have been supplemented by significant values of physical parameters of materials dependent on temperature, in particular viscosity of the composite matrix. The investigations have been focused on the influence of solidification process on the final distribution of ceramic reinforcing particles for different thermal boundary conditions, especially the molten cast and the mould wall interface. As the results show, the existence of thermal resistance or its lack on the interface between casting material and the mould has an influence on course and speed of solidification process and final redistribution of ceramic reinforcement of composite.