Mould filling simulation in high pressure die casting by meshless method

Simulation of mould filling in high pressure die casting has been an attractive area of research for many years. Several numerical methodologies have been adopted in the past to study the flow behaviour of the molten metal inside the die cavities. However, many of these methods require stationary mesh or grid which limits their ability in simulating highly dynamic and transient flows encountered in high pressure die casting processes. In recent years, the advent of meshfree methods have led to the opening of new avenues in numerical computational field. Consequently, particle based methods have emerged as an attractive alternative for modeling mould filling simulation in pressure die casting processes. In this paper the Corrected Smooth Particle Hydrodynamics (CSPH) method is used to simulate fluid flow in the high pressure die casting cavity. CSPH is a Lagrangian method based on Smooth Particle Hydrodynamics (SPH) techniques. In CSPH method, the quantities determining the flow are localised on set of particles, which move with the flow. This enables the method to easily follow complex free surfaces, including fragmentation. This paper mainly deals with the formulation of governing equation required CSPH simulation of high pressure die casting process and presents a number of numerical results to demonstrate the capabilities of the numerical model