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In this paper, a transient numerical model was applied to simulate the vacuum directional solidification (VDS) process of multicrystalline silicon (mc-Si) under different pulling-down rates, and the evolution of temperature distribution, thermal stresses and shape of solid/liquid (s/l) interface were simulated and analyzed. The experiments, such as the content and distribution of metal impurity, the...
In this paper a mathematical model is developed to investigate the removal of volatile impurities in molten silicon by electron beam melting (EBM) with a high efficiency and low energy consumption. The temperature distribution of molten silicon is obtained using the commercial software FLUENT. Based on the temperature distribution, the vaporization behaviors of phosphorus and silicon are investigated...
The paper presents numerical simulation of electron gun of traveling-wave tube (TWT). New emission model for the simulation of electron gun limited by space charge has been developed and implemented in the program TWT Gun Simulation and Design (TGSD), which is a new two-dimensional finite-element code developed in MATLAB, for the simulation and design of axially symmetric electron guns of TWTs. The...
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