静态磁场对分离结晶中熔体流动的影响（英文）

发布时间：2018-07-07 13:50

本文选题：分离结晶 + 静态磁场　；参考：《Transactions of Nonferrous Metals Society of China》2015年03期

【摘要】：采用三维数值模拟手段对微重力条件下熔体内部的热毛细对流以及常重力条件下熔体内部的热毛细-浮力对流进行研究。模拟中选取无磁场、施加轴向磁场和施加勾形磁场3种不同的磁场条件进行对比。模拟结果表明,轴向磁场和勾形磁场都能够有效地抑制熔体内部的流动和温度波动;在相同磁场强度下,轴向磁场的抑制效果比勾形磁场更为显著。此外,还对重力条件下熔体内部热毛细-浮力对流的失稳机理进行分析,以研究磁场对临界Ma数的影响。
[Abstract]:The thermal capillary convection in the melt under microgravity and the thermocapillary buoyancy convection in the melt under the constant gravity are studied by means of three-dimensional numerical simulation. In the simulation, three kinds of magnetic field conditions, namely, no magnetic field, axial magnetic field and hook magnetic field, were selected and compared. The simulation results show that both the axial magnetic field and the hook magnetic field can effectively suppress the flow and temperature fluctuation in the melt, and the suppression effect of the axial magnetic field is more obvious than that of the hook magnetic field under the same magnetic field intensity. In addition, the instability mechanism of thermal capillary buoyancy convection in the melt under gravity is analyzed to study the influence of magnetic field on the critical Ma number.
【作者单位】：重庆大学动力工程学院低品位能源利用技术及系统教育部重点实验室;
【基金】：Project(51276203)supported by the National Natural Science Foundation of China
【分类号】：TG111

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