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首页> 外文会议>Advances in the science and engineering of casting solidification >THE FLUID FLOW AND SOLIDIFICATION PHENOMENON IN BILLET CONTINUOUS CASTING PROCESS WITH MOLD AND FINAL ELECTROMAGNETIC STIRRINGS
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THE FLUID FLOW AND SOLIDIFICATION PHENOMENON IN BILLET CONTINUOUS CASTING PROCESS WITH MOLD AND FINAL ELECTROMAGNETIC STIRRINGS

机译：铸模和最终电磁搅拌的连铸坯连铸过程中的流体流动和凝固现象

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摘要

Coupling electromagnetic field, flow field and solidification phenomena, a 3D numerical model was developed to simulate the SWRT82B steel billet by continuous casting with mold (M-EMS) and final electromagnetic stirrings (F-EMS). The columnar region was regarded as a porous media and a generalized approach was used to calculate permeability, while for the equiaxed zone, a variable apparent viscosity model was applied to simulate the fluid flow at the early stage of equiaxed dendrites. The model was validated by the measured data in plant. The simulation results show that the fluid flow pattern near the meniscus with considering solidification is quite different from that without considering solidification. And the maximum stirring velocity of molten steel in M-EMS and F-EMS zone increases with the increase of the current intensity. Moreover, the critical coherency solid fraction determined by the crystal morphology affects the fluid flow in F-EMS zone strongly.
机译：结合电磁场，流场和凝固现象，开发了一个3D数值模型，通过连铸模（M-EMS）和最终电磁搅拌（F-EMS）来模拟SWRT82B钢坯。柱状区域被认为是一种多孔介质，并采用一种通用的方法来计算渗透率，而对于等轴区，则采用了一个可变的表观粘度模型来模拟等轴树突早期的流体流动。通过工厂中的实测数据验证了该模型。仿真结果表明，考虑凝固的弯月面附近的流体流动模式与不考虑凝固的情况大不相同。随着电流强度的增加，M-EMS和F-EMS区钢水的最大搅拌速度也随之增加。而且，由晶体形态确定的临界相干固体分数强烈影响F-EMS区中的流体流动。

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