Research of solidification model for the melt based on SIMPLE algorithm

The cooling characteristics of the melt have important influence on the process of IVR in a severe accident. An enthalpy formulation based on fixed grid methodology was developed for the numerical solution of convection-diffusion controlled mushy zone phase-change solidification of the melt. The process of the solidification was simulated by solving the N-S equations and the enthalpy formulation equation using the SIMPLE algorithm. The phase-change model could simulate the solidification and mushy zone well, and it was verified by the use of analytical solutions and benchmark problems.