本文選題：分離結晶 + 靜態(tài)磁場��； 參考：《Transactions of Nonferrous Metals Society of China》2015年03期

【摘要】：采用三維數值模擬手段對微重力條件下熔體內部的熱毛細對流以及常重力條件下熔體內部的熱毛細-浮力對流進行研究。模擬中選取無磁場、施加軸向磁場和施加勾形磁場3種不同的磁場條件進行對比。模擬結果表明,軸向磁場和勾形磁場都能夠有效地抑制熔體內部的流動和溫度波動;在相同磁場強度下,軸向磁場的抑制效果比勾形磁場更為顯著。此外,還對重力條件下熔體內部熱毛細-浮力對流的失穩(wěn)機理進行分析,以研究磁場對臨界Ma數的影響。
[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.
【作者單位】： 重慶大學動力工程學院低品位能源利用技術及系統教育部重點實驗室;
【基金】：Project(51276203)supported by the National Natural Science Foundation of China
【分類號】：TG111

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