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Journal of the Brazilian Society of Mechanical Sciences and Engineering

Print version ISSN 1678-5878


FERREIRA, Alexandre Furtado; FERREIRA, Leonardo de Olivé  and  ASSIS, Abner da Costa. Numerical simulation of the solidification of pure melt by a phase-field model using an adaptive computation domain. J. Braz. Soc. Mech. Sci. & Eng. [online]. 2011, vol.33, n.2, pp.125-130. ISSN 1678-5878.

In this paper, we present a phase-field model with a grid based on the Finite-Difference Method, for improvement of computational efficiency and reducing the memory size requirement. The numerical technique, which is based on the temperature change of the pure material, enables us to use, in the initial steps of the computation, a very small computational domain. Subsequently, in the course of the simulation of the solidification process, the computation domain expands around the dendrite. The computation showed that the dendrite with well-developed secondary arms can be obtained with low computation time and moderate memory demand. The computational efficiency of this numerical technique, the microstructural evolution during the solidification, and competitive growth between side-branches are discussed.

Keywords : computer simulation; dendrites; phase field; nickel; numerical efficiency.

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