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首页> 外文期刊>International Journal of Heat and Mass Transfer >Surrogate model for convective flow inside electromagnetically levitated molten droplet using magnetohydrodynamic simulation and feature analysis
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Surrogate model for convective flow inside electromagnetically levitated molten droplet using magnetohydrodynamic simulation and feature analysis

机译：基于磁流体动力学和特征分析的电磁悬浮液滴内部对流流动的替代模型

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摘要

Containerless processing of molten metals using electromagnetic levitation techniques is an important approach for material research, and the induced convection inside an electromagnetically levitated molten metal droplet is both difficult to measure experimentally and a key control parameter. This work proposed a surrogate model based on parametric numerical experiments of magnetohydrodynamic simulations of the ISS-EML facility, characterizing and quantifying the convective flow due to electromagnetic positioning power as a function of melt thermophysical properties. Feature mapping methods integrated with feature selection is used to construct an optimized formula in explicit form for the data fitting which maintains both of physical interpretability and mathematical tractability. The trained surrogate model is then applied for selected industrial important metals and alloys as examples that show the generalization ability of the model and how it can be utilized to quantify the induced convection and characterize internal flow patterns. (C) 2019 Elsevier Ltd. All rights reserved.
机译：使用电磁悬浮技术对金属进行无容器处理是材料研究的重要方法，而电磁悬浮金属滴内部的感应对流既难以通过实验测量，也难以控制。这项工作提出了一个替代模型，该模型基于ISS-EML设施的磁流体动力学模拟的参数数值实验，表征和量化了由于电磁定位功率而引起的对流流动，该流动是熔体热物理性质的函数。与特征选择集成的特征映射方法用于以显式形式构造优化的公式，以进行数据拟合，同时保持物理解释性和数学易处理性。然后，将经过训练的替代模型应用于选定的工业重要金属和合金，以显示该模型的泛化能力以及如何利用它来量化诱导对流并表征内部流型。 （C）2019 Elsevier Ltd.保留所有权利。

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