摘要
基于耦合的二维Ｎａｖｉｅｒ－Ｓｔｏｋｅｓ动量方程和热传导方程建立了单辊法制备非晶合金中的传热和熔体流体动力学模型．利用ＳＩＭＰＬＥ差分算法计算了熔池内的温度场和速度场．获得了不同辊速条件下熔体的平均冷却速度．与红外热像法测得的Ｆｅ７８Ｓｉ９Ｂ１２Ｍｏ非晶合金的冷却速度相比，数值模拟得到的冷却速度在熔池大部分范围内与实验结果接近．在熔池的左右边界，由于界面换热系数难以准确预测。
A numerical modelling of heat transfer and fluid dynamics in melt spinning process forpreparing amorphous alloys by single roller is developed based on the coupled Navier-Stokes and heatconduction equations. The thermal and velocity fields inside the melt puddle are characterized for differentwheel velocity by using SIMPLE algorithm. The average cooling rate cross the whole thickness of thepuddle is also calculated. It is shown that the calculated averaging cooling rate is in good agreementwith the experimental results of Fe78Si9B12Mo amorphous alloy obtained with the help of an infraredthermovision technique through the most part of the puddle. The simulated values of the quenching ratethat near the upperstream and downstream meniscus are larger than that of experimental results becausethe heat transfer coefficient is difficult to be estimated.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1999年第11期1206-1210,共5页
Acta Metallurgica Sinica
基金
中国科学院重大项目!KJ951-B1-704(2)
关键词
非晶合金
数值模拟
单辊法
传热
熔池
heat transfer, flow dynamics, melt spinning process, amorphous alloy
