Modeling of coupled motion and growth interaction of equiaxed dendritic crystals in a binary alloy during solidification.

ABSTRACT: Motion of growing dendrites is a common phenomenon during solidification but often neglected in numerical simulations because of the complicate underlying multiphysics. Here a phase-field model incorporating dendrite-melt two-phase flow is proposed for simulating the dynamically interacted process. The proposed model circumvents complexity to resolve dendritic growth, natural convection and solid motion simultaneously. Simulations are performed for single and multiple dendritic growth of an Al-based alloy in a gravity environment. Computing results of an isolated dendrite settling down in the convective supersaturated melt shows that solid motion is able to overwhelm solutal convection and causes a rather different growth morphology from the stationary dendrite that considers natural conve

SUBMITTER: Qi XB 

PROVIDER: S-EPMC5374713 | biostudies-literature | 2017 Mar

REPOSITORIES: biostudies-literature