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本文对工业用泡生法制备蓝宝石单晶炉热场建立了二维稳态全局及局部数值模型.基于全局模拟结果,比较分析了不同热内边界条件的选取对局部核心区域热场及流场分布的影响.结果表明,基于全局/局部耦合算法的计算方案是可行的,当辐射-对流边界选取第二类边界、辐射-导热边界选取第一类边界、导热-导热边界选取第一类或第二类边界时,局部模拟结果的准确性最高,且局部网格划分与全局相应区域网格划分不一致时,对模拟结果几乎无影响.
In this paper, two-dimensional steady-state global and local numerical models are established for thermal field of single-crystal furnace of sapphire crystal prepared by bubble-blowing method. Based on the results of global simulation, the thermal field and flow field of local core region The results show that the calculation method based on the global / local coupling algorithm is feasible. When the second boundary is selected for the radiation-convection boundary, the first boundary is selected for the radiation-heat conduction boundary and the first or second boundary for the heat- In the second type of boundary, the accuracy of the local simulation results is the highest, and the local grids are not consistent with the corresponding global grids, which has little effect on the simulation results.