摘要
为了了解磁场对分离结晶过程中熔体内热毛细对流的影响,利用有限差分法进行了数值模拟。假定熔体为不可压缩流体,熔体深径比为1,自由表面无因次宽度为0.1,研究了哈特曼数分别为0、25、50和75时的碲锌镉晶体生长过程。结果表明:轴向磁场能够抑制熔体内部的流动,并随磁场强度的增加,抑制作用增强。
In order to investigate the effects of the magnetic field on the thermocapillary convection in the detached solidification,the finite-difference method was used to carry on numerical simulation. It was assumed that the melt was incompressible,the values of the aspect ratio（height/radius） of the crucible equal to 1,and the nondimensional width of the free interface equal to 0.1.We researched the growth of CdZnTe,when the Hartmann number is equal to 0,25,50 and 75,respectively.The results indicate that,the axial magnetic can effectively inhibit the strength of the flow,and with the magnetic field strength increasing,the inhibition further enhanced.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2011年第5期737-740,共4页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.51076173)
关键词
分离结晶
轴向磁场
碲锌镉
热毛细对流
微重力
detached solidification
axial magnetic field
CdZnTe
thermocapillary convection
microgravity
