Coarsening in Solid-Liquid Mixtures-4

The objective is to study coarsening in solid-liquid mixtures at low volume fractions of solid. The topology and morphology of these dendritic mixtures will be determined using three-dimensional reconstructions and phase field simulations that employ these reconstructions as initial conditions will provide insights into the mechanisms of coarsening.  These low volume fractions will enable the science team to examine coarsening of single or a few dendrites, something that is impossible on the ground.  These studies will provide insights into the dynamics of morphological evolution of these systems and will point the way to the formulation of models of this technologically important coarsening process.

本研究旨在探究低固体体积分数下固液混合物中的粗化（coarsening）现象。这些枝晶混合物的拓扑结构与形态将通过三维重构（three-dimensional reconstructions）技术确定；而以这些重构结果为初始条件的相场模拟（phase field simulations），将为揭示粗化机制提供深入见解。低固体体积分数使科研团队能够研究单个或少量枝晶的粗化过程——这在地面环境中是无法实现的。这些研究将揭示此类系统形态演化的动力学规律，并为构建这一具有重要技术意义的粗化过程模型指明方向。