Development and Application of a Structured/Unstructured Combined Mesh Scheme for Global Modeling of a Directional Solidification Process of Silicon
Development and Application of a Structured/Unstructured Combined Mesh Scheme for Global Modeling of a Directional Solidification Process of Silicon
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DOI：
10.1149/1.3360749
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发表时间：
2010-11
期刊：
影响因子：
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通讯作者：
Zaoyang Li;Lijun Liu;K. Kakimoto
中科院分区：
文献类型：
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作者：
Zaoyang Li;Lijun Liu;K. Kakimoto
为了提高太阳能硅定向凝固过程全局模拟的精度和效率，提出了一种结构化/非结构化相结合的网格划分方法。采用多块结构化网格对边界规则的子域进行离散。采用非结构网格对边界高度不规则的子区域进行离散。然后将其应用于定向凝固过程的传热全局模拟中，研究了氩气流量对炉内传热和杂质（氧气为例）迁移的影响。结果表明，与热辐射相比，氩气流对整体传热的影响较小，但对杂质输运的影响较大。在熔体表面由氩气流带走的氧气量与氩气流速密切相关。
In order to improve the accuracy and efficiency of global modeling of a directional solidification process for solar silicon, we developed a structured/unstructured combined mesh scheme. The multi-block structured mesh was used to discretize those subdomains with regular boundaries. The unstructured mesh was used to discretize those sub-domains with highly irregular boundaries. Then it was applied in the global modeling of heat transfer for a directional solidification process to investigate the effect of argon flow rate on heat transfer and impurities transport (oxygen as an example) in the furnace. It was found that the argon flow has little effect on the global heat transfer compared with thermal radiation, while its effect on impurities transport is remarkable. The amount of oxygen carried away by the argon flow at the melt surface is closely correlated with the argon flow rate.