电磁力场作用下凝固界面前沿颗粒迁移特性的理论模型  

Theoretical Model for Particle Migrating Behavior Ahead of Slidification Front in Electromagnetic Field

作　　者：江志文[1] 任忠鸣[1] 钟云波[1] 

机构地区：[1]上海大学上海市钢铁冶金重点实验室,上海200072

出　　处：《上海有色金属》2000年第2期49-53,共5页Shanghai Nonferrous Metals

基　　金：上海市科委重点资助项目 !( 97JC14 10 7)

摘　　要：本文在前人对无外力场作用时颗粒在凝固界面前受力分析的基础上 ,对电磁力场作用下颗粒在凝固界面前沿的迁移特性进行了理论上的分析讨论 ,分别推导了一定电磁力作用下水平和垂直凝固界面前沿颗粒推斥 /吞没转变的临界凝固速度 ,以及一定凝固速度下 ,水平和垂直凝固界面前沿颗粒推斥 /吞没转变的临界电磁力。In this paper,the particle migrating behavior ahead of solidification front is analyzed theoretically with the application of an electromagnetic field,which is based on the other peoples analysis of force acting upon the particle without applying an electromagnetic field.The critical solidification speed of particle pushing engulfing transition ahead of the horizontal and vertical interface in the electromagnetic field is derived.The critical electromagnetic force of particle pushing/engulfing transtion ahead of the interface is also derived when the solidification speed is given.

关 键 词：电磁力场 凝固界面 颗粒迁移特性 电磁冶金 

分 类 号：O552[理学—热学与物质分子运动论]