Abstract
A radial integral boundary element method (BEM) is used to simulate the phase change problem with a mushy zone in this paper. Three phases, including the solid phase, the liquid phase, and the mushy zone, are considered in the phase change problem. First, according to the continuity conditions of temperature and its gradient on the liquid-mushy interface, the mushy zone and the liquid phase in the simulation can be considered as a whole part, namely, the non-solid phase, and the change of latent heat is approximated by heat source which is dependent on temperature. Then, the precise integration BEM is used to obtain the differential equations in the solid phase zone and the non-solid phase zone, respectively. Moreover, an iterative predictor-corrector precise integration method (PIM) is needed to solve the differential equations and obtain the temperature field and the heat flux on the boundary. According to an energy balance equation and the velocity of the interface between the solid phase and the mushy zone, the front-tracking method is used to track the move of the interface. The interface between the liquid phase and the mushy zone is obtained by interpolation of the temperature field. Finally, four numerical examples are provided to assess the performance of the proposed numerical method.
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Citation: YAO, H. X., YAO, W. A., ZUO, C., and HU, X. F. Radial integral boundary element method for simulating phase change problem with mushy zone. Applied Mathematics and Mechanics (English Edition), 42(8), 1155–1170 (2021) https://doi.org/10.1007/s10483-021-2760-8
Project supported by the National Natural Science Foundation of China (No. 11672064)
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Yao, H., Yao, W., Zuo, C. et al. Radial integral boundary element method for simulating phase change problem with mushy zone. Appl. Math. Mech.-Engl. Ed. 42, 1155–1170 (2021). https://doi.org/10.1007/s10483-021-2760-8
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DOI: https://doi.org/10.1007/s10483-021-2760-8