Study of the Flow Properties using Simulation Modeling for the Melt Growth by Bridgman - Stockbarger Method

摘要

Numerical modeling as a comprehensive tool in modern process development is extensively used for promotion of crystal growth. The application of devices requires large diameter single crystals with a high degree of crystallographic perfection, low defect density and uniform dopant distribution. The finite element method (FEM) is employed to simulate the temperature and velocity distribution during a large crystal growth process. In this present paper the flow properties such as heat flux, temperature distribution, temperature gradient and velocity field are simulated for two different crucibles. The Navier - Stokes equations governing the fluid motion are computationally solved by FEM. The low and high Reynolds numbers (laminar flow, turbulence flow) are found for two different size of crucibles in Bridgman-Stockbarger technique. The flow pattern of the melt is controlled to improve the quality of single crystals.