유체 유동을 동반한 수치상결정 미세구조의 3차원 성장에 대한 수치해석적 연구

NUMERICAL SIMULATION OF THREE-DIMENSIONAL DENDRITIC GROWTH WITH FLUID CONVECTION

Most material of engineering interest undergoes solidification process from liquid to solid state. Identifying the underlying mechanism during solidification process is essential to determine the microstructure of material which governs the physical properties of final product. In this paper, we expand our previous two-dimensional numerical technique to three-dimensional simulation for computing dendritic solidification process with fluid convection. We used Level Contour Reconstruction Method to track the moving liquid-solid interface and Sharp Interface Technique to correctly implement phase changing boundary condition. Three-dimensional results showed clear difference compared to two-dimensional simulation on tip growth rate and velocity.