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Numerical simulation of macrosegregation during steel ingot solidification using continuum model 总被引:1,自引:0,他引:1
A continuum model is adopted to study the macrosegregation phenomena during solidification of large steel ingots. Evolution
of temperature, melt velocity, and compositional concentration field during a 22 t steel ingot solidification are illustrated
by using the finite volume method. Numerical results of temperature distribution are validated by experiments. The influence
of local permeability relates to the friction that the melt experienced in mushy region is investigated. It is shown that
the continuum model is able to predict the temperature field, and the variation of permeability obviously affects the melt
flowing behavior and the final compositional distribution. 相似文献
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基于复杂网络理论统计参数的介数概念,给出了网络在发生随机故障后,网络中边的最大介数估算公式.边的介数是指通过该边的最短路径数量,网络中拥有最大介数的边在通信过程中最容易出现拥塞,提出估计公式的意义在于:能够更好的估算在各种情形下网络所能容纳的通信连接的数量,即可以更准确的估计网络容量.实验表明,所提出的估计公式具有合理性,为边的介数估算提供了一种新的方法,也可以为流量工程的设计及网络规划等提供重要依据. 相似文献
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