Abstract
A phase-field-lattice Boltzmann model (PF-LBM) coupled with immersed boundary method is developed to simulate the growth and motion of dendrites against convection. A conservative phase-field model is employed to maintain mass conservation. A parallel adaptive mesh refinement (Para-AMR) approach is developed to improve the computational efficiency. Multi-dendrite growth and motion against 3-D cavity flow is simulated and simulation results reveal the morphological transition of moving dendrites, together with collision and coalescence. The interaction between dendrite and flow is accurately restored, enabling one to grasp and understand the microstructure evolution in practical solidification condition.
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