摘要
本文引入固相率指数的概念,并假定该指数是固相率的线性函数,通过适当选取该函数,找到了一种求解金属凝固传热问题时使差分解的凝固速度接近分析解的方法。并发现,对于合金凝固,在固相线温度一定的情况下,液相线温度的高低对凝固速度几乎没有影响。同时,探讨了该法对连铸传热差分计算的影响。
The concept of fs—index (fs:fraction solidified) is introduced in this paper, and it is assumed that the fs—index is a linear function of fs, by appropriately selecting this function,the problem that the solidification rate calculated by finite difference is lower than the solidification rate calculated by analytical solution is solved. And it is discovered that the liquidus temperature hardly has effects on the solidification rate of alloy if solidus temperature is fixed. The effects of this concept on the difference calcuation of heat transfer in cotinuous casting are also discussed.
出处
《钢铁研究》
CAS
1992年第5期35-39,30,共6页
Research on Iron and Steel
关键词
传热
凝固
差分解
固相率指数
金属
heat transfer
solidification rate
finite difference
fs—index(fs:fraction solidified)
