Abstract The present work endeavours to map mold filling characteristics of water to real melts of A356 aluminium alloy and AM50 magnesium alloy during low pressure casting process (LPC). The analogy of dynamic similitude has been applied on a benchmarked computational fluid dynamics (CFD) based simulation model developed for tracking fluid free surfaces. Scaling factors for A356 and AM50 melts with respect to water are calculated by equating the non-dimensional numbers deduced from forces acting on the fluids. Buckingham's Pi theorem is used to verify the derived scaling equations. The mold filling time for water in the benchmarked simulation model and for real alloy melts in the scaled computational models is compared for different inlet pressure regimes. The proposed analogy is verified using variations occurring in velocity scaling factors for the melts during mold filling.

中文翻译：

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LPC工艺过程中水、A356和AM50合金流动特性的相似分析

摘要 目前的工作致力于将水的充模特性映射到 A356 铝合金和 AM50 镁合金在低压铸造过程 (LPC) 过程中的真实熔体。动态相似性的类比已应用于基于基准计算流体动力学 (CFD) 的仿真模型，该模型用于跟踪流体自由表面。A356 和 AM50 熔体相对于水的比例因子是通过使从作用在流体上的力推导出的无量纲数相等来计算的。Buckingham's Pi 定理用于验证导出的缩放方程。比较基准模拟模型中水的充模时间和比例计算模型中真实合金熔体的充模时间，用于不同的入口压力状态。