液封液桥内热毛细对流的数值模拟  

NUMERICAL SIMULATION OF MARANGONI CONVECTION IN LIQUID BRIDGE WITH LIQUID ENCAPSULATION

作　　者：彭岚[1] 李友荣[1] 曾丹苓[1] 王忠[1] 

机构地区：[1]重庆大学动力工程学院,重庆400044

出　　处：《力学学报》2006年第5期593-598,共6页Chinese Journal of Theoretical and Applied Mechanics

基　　金：国家自然科学基金(50476042);教育部留学回国人员科研启动基金(2005-383);重庆市自然科学基金(2004-8560)资助项目.~~

摘　　要：建立了液封液桥(不相溶混的双层同轴液柱)内热毛细对流的物理数学模型,采用涡量-流函数法、利用有限差分格式对微重力条件下液封液桥内热毛细对流进行了数值模拟,得到了双层液柱主流区的温度场和流场,证实了液封技术能削弱液桥主流区的热毛细对流,从而提高浮区晶体生长质量,找出了液封厚度以及内、外层流体物性参数比对液桥内热毛细对流的影响规律．The physical and mathematical models of the Marangoni convection in an encapsulated liquid column （or two immiscible coaxial liquid columris） were established. A numerical simulation of the Marangoni convection in the encapsulated liquid column was performed by using the vorticity-streamfunction method and the alternative direction implicit scheme based on finite difference. The distributions of temperature and flow field in two immiscible coaxial liquid columns are obtained. It is verified that the liquid encapsulation can reduce the Marangoni convection in the encapsulated liquid bridge. Effects of non-dimensional parameters on Marangoni convection are analyzed.

关 键 词：传热传质学 液封液桥 热毛细对流 数值模拟 微重力 

分 类 号：TK124[动力工程及工程热物理—工程热物理]