- Bridging the Terahertz Gap
- Modeling the Lithium-Ion Battery
- Protection contre la Corrosion
- Modélisation des batteries
- Modélisation et Simulation dans le développement des piles à combustible
- Modélisation thermique des petits satellites
- Analyse électro-vibroacoustique d'un transducteur à armature équilibrée
Simulation of Dendritic Solidification in Cubic and HCP Crystals by Cellular Automaton and Phase-Field Models
A cellular automaton (CA)-finite element (FE) model and a phase field (PF)-FE model were used to simulate equiaxed dendritic growth during solidification of cubic and hexagonal crystals.
The governing equations of PF model include three coupled partial differential equations (PDE) for evolution of concentration, temperature, and non-conserved PF variable. These PDEs were solved using the mathematics module in COMSOL multiphysics software.
The validation of both models was performed by comparing the simulation results with the analytical model developed by Lipton-Glicksman- Kurz (LGK). Dendritic solidification in cubic and hexagonal materials are illustrated by simulating the solidification in aluminum alloy Al-3wt%Cu and magnesium alloy AZ91, respectively. Results show a better performance of PF-FE in modeling multiple arbitrarily-oriented dendrites in hexagonal systems.
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