Numerical Simulation Based On Euler-Lagrange Method Of The Filling Process Of The Foam Pattern

In lost foam casting ,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 .The partial differential equations which is based on Euler-Lagrange model containing 10 variables are established systematically to control dense gas-solid two-phase turbulent flow in which variable density in two-phase turbulent flow have been taken into account, and the foundation is thus laid for numerical analysis.A new algorithm is proposed to solve dense compressible gas-solid two-phase flow. The pressure correction equations of gas pressure is established in which correction of gas concentration is considered so that it can be applied to variable density case.Based on Euler-Lagrange method, the filling process is simulated by Fluent, an analysis software of the computation fluid dynamics. By comparing the result of numerical simulation with the examinations, it is found that the fluid trend of foam beads in the numerical simulation is accordant to the actual process.