Interfacial evolution of a spherical particle in a uniaximal straining flow  

作　　者：陈明文 贺国伟 陈修月 王自东 

机构地区：[1]School of Mathematics and Physics,University of Science and Technology Beijing [2]Department of Mathematics and Statistics,McGill University,Montreal,QC,H3A 0B9,Canada [3]School of Materials Science and Engineering,University of Science and Technology Beijing

出　　处：《Chinese Physics B》2012年第10期375-379,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant No. 10972030);the Fundamental Research Funds for the Central University (Grant No. FRF-BR-11-034B);the Overseas Distinguished Scholar Program by the Ministry of Education,China (Grant No. MS2010bjkj005)

摘　　要：The growth behavior of a spherical particle in undercooled melt,affected by uniaxial straining flows,is studied.The analytical solution obtained by the matched asymptotic expansion method shows that the uniaxial straining flow effect results in higher local growth rate near the surface where the flow comes in and lower local growth rate near the surface where the flow goes out,and that the uniaxial straining flow causes an initially spherical particle to evolve into an oblate spheroid.The growth behavior of a spherical particle in undercooled melt,affected by uniaxial straining flows,is studied.The analytical solution obtained by the matched asymptotic expansion method shows that the uniaxial straining flow effect results in higher local growth rate near the surface where the flow comes in and lower local growth rate near the surface where the flow goes out,and that the uniaxial straining flow causes an initially spherical particle to evolve into an oblate spheroid.

关 键 词：CONVECTION INTERFACES NUCLEATION crystal morphology crystal growth model 

分 类 号：O35[理学—流体力学]