Numerical Simulation To Process Of Filling The Foam Mould

In lost foam casting(LFC),the foam pattern is the key qualification, and the filling process is one of the crucial processes to ensure the high quality of the foam pattern. Filling without uniformity and denseness will cause various defects and affect the quality of the surface. The influential factors of filling process are realized .And optimizing filling process, enhancing efficiency, decreasing waster and so on are obtained by the numerical simulation of filling process using computer . In this paper the governing equations of the dense compressible gas-solid two-phase flow are established, and the physical signification of each one in the equations is discussed. The filling process is solved by Euler-Euler two fluid model .It is crucial for the simulation. The filling process is simulated by Fluent, an analysis software of the computation fluid dynamics. In the simulation, SIMPLE and implicit segregated methods are used. The volume of foam bead in every governing unit at different time is calculated, and the trend of foam bead flow is obtained. The filling process of various different conditions are simulated, considering different shooting methods and the position of baffles, and recorded by digital vidicon. The characteristics and the rules of the process are summarized. By contrasting the result of numerical simulation with the one of examination, it is found that the fluid trend of foam bead in the numerical simulation is accordant to the actual process. So the numerical simulation of filling process by applying this model is an effective method.