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Modelling of a Novel Configuration for Single-belt Caster: The Influence of Empirical Parameters on the Solidification Profile

机译：新型带式连铸机的建模：经验参数对凝固轮廓的影响

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摘要

A mathematical was developed to simulate fluid flow/heat transfer phenomena in a proposed configuration for a single-belt caster. The main goal of the research was to evaluate the flow modifications yielded by the insertion of a flow modifier in the computational domain. This paper deals in particular with the influence of some empirical parameters in the model predictions. The most important inputs for the mathematical model were found to be interfacial heat transfer coefficient h and the morphology constant C. These two parameters, in addition to the numerical treatment for turbulence, had a remarkable influence on the model's outputs. A very high value of C generates strong dampening of velocities within the interdendritci, mushy zone. This leads to predictions of premature solid shell growth within the extended metal delivery zone, leading to too thick a solid shell and too thin a mushy zone at the end of the computational domain. As for the instantaneous heat transfer coefficient, h, and attempt was made to predict its transient characteristics using an experimental simulator. This equipment mimics metal deposition on a substrate moving at the same velocity as an industrial belt (～0.5-1 m/s). Comparisons of predictions made on the basis of different schemes for the variation in h are reported. The importance of an accurate prediction for the way h varies, in terms of the belt's required cooling length, is stressed.
机译：在单带式脚轮的建议配置中，开发了一种数学模型来模拟流体流动/传热现象。该研究的主要目的是评估通过在计算域中插入流量修改器而产生的流量修改。本文特别讨论了一些经验参数对模型预测的影响。发现该数学模型最重要的输入是界面传热系数h和形态常数C。这两个参数除了对湍流进行数值处理外，还对模型的输出产生了显着影响。很高的C值会强烈抑制中间糊状区域内的速度。这导致在扩展的金属输送区域内过早出现固体壳生长的预测，从而导致固体壳太厚而计算域末端的糊状区太薄。关于瞬时传热系数h，并尝试使用实验模拟器来预测其瞬时特性。该设备模仿金属在以与工业传送带相同的速度（〜0.5-1 m / s）移动的基底上的沉积。报告了基于不同方案对h的变化做出的预测的比较。强调了根据皮带所需的冷却长度对h的变化方式进行准确预测的重要性。

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