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首页> 外文期刊>Numerical Heat Transfer, Part B. Fundamentals: An International Journal of Computation and Methodology >A generalized enthalpy-based macro model for ternary alloy solidification simulations
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A generalized enthalpy-based macro model for ternary alloy solidification simulations

机译：基于广义焓的三元合金凝固模拟宏模型

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摘要

In this article, a generalized macroscopic mathematical model is developed to simulate the transport phenomena occurring during the solidification of ternary alloy systems. The model is essentially based on a fixed-grid, enthalpy-based control-volume approach. Microscopic features pertaining to complex thermosolutal transport mechanisms are incorporated through a novel formulation of latent enthalpy evolution, consistent with the phase-change morphology of general multicomponent alloy systems. Numerical simulations are performed for two different ternary steel alloys of apparently contrasting thermosolutal transport characteristics, and the resulting convection and macrosegregation patterns are analyzed in detail. The mathematical model is also tested by comparing the present numerical results with benchmark analytical solutions and experimental data reported in the literature for ternary alloy solidification systems, and excellent agreement is found in this regard.
机译：在本文中，开发了一个广义的宏观数学模型来模拟三元合金系统凝固过程中发生的传输现象。该模型基本上基于固定网格，基于焓的控制量方法。通过复杂的潜热演化新形式，纳入了与复杂的热溶质输运机制有关的微观特征，这与一般的多组分合金系统的相变形态相一致。对明显不同的热固溶输运特性的两种不同的三元钢合金进行了数值模拟，并详细分析了对流和宏观偏析模式。通过将当前数值结果与基准分析解决方案和文献中针对三元合金凝固系统报道的实验数据进行比较，还对数学模型进行了测试，并且在此方面发现了极好的一致性。

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