A mathematical model for a freeze–thaw process consists of partial differential equations governing the heat transfer in all three regions: unfrozen, frozen, and mushy. Analytical solution for these governing equations during phase change is impossible due to their complexity. Therefore, numerical methods based on a fundamentally sound theory, have to be used (Huan, He, & Ma, 2003). The challenging step in simulating phase change of a food system is the description of non-linear thermal properties in time and space. In such cases, it has been shown that the finite element method (FEM) is the most suitable numerical method for obtaining converged solutions (Kumar & Subhendu, 2009).