Abstract
Numerical simulation on the thermosolutal crystal growth is challenging because of multiscale nature. In this work, three-dimensional (3D) thermosolutal dendritic and eutectic growth are simulated by a phase-field lattice-Boltzmann approach. The phase-field model is used to simulate the crystal growth and the lattice Boltzmann method is employed to determine the thermal evolution. Results show that the temperature obtains the extreme at the solid/liquid interface due to the release of latent heat, which increases local temperature and alters crystal growth velocity. The thermal distribution during dendrite growth is unevenly distributed inside the domain, while that during eutectic solidification becomes uniform along the direction parallel to the growth front. Crystal growth under different boundary conditions is also discussed. The 3D crystal simulations demonstrate the feasibility of the present numerical scheme in modeling thermosolutal interaction during solidification.
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