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首页> 外文期刊>International Journal of Heat and Mass Transfer >A fast simulation of transient metal flow and solidification in a narrow channel. Part II. Model validation and parametric study
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A fast simulation of transient metal flow and solidification in a narrow channel. Part II. Model validation and parametric study

机译：快速模拟瞬态金属在狭窄通道中的流动和凝固。第二部分模型验证和参数研究

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摘要

The numerical algorithm developed in Part I is applied to a problem involving transient flow and solidification of a molten metal in a narrow gap, especially in the ventilation channels of die-cast dies. The presented algorithm is based on the lubrication approximation where the 2-D in-plane equations are obtained after integrating the 3-D flow equations. Applying heat balance over the control volume yields the accompanying temperature equation. These equations were applied to approximate flow and solidification in the narrow sections of a die-cast die. The numerical algorithm was verified by comparing the results with the ones obtained from the commercial software FLOW3D®, and the actual die-cast parts. Solidification characteristics were verified by measuring SDAS (secondary dendrite arm spacing). A parametric study explored the dependence of the metal flow-length in the channel on factors such as channel thickness, entrance metal velocity, and wall temperature. The presented algorithm was successfully implemented with significant savings in CPU time.
机译：第一部分中开发的数值算法适用于一个问题，该问题涉及在狭窄的间隙中，特别是在压铸模具的通风通道中，熔融金属的瞬态流动和凝固。提出的算法基于润滑近似，其中在整合了3-D流动方程后获得了2-D平面方程。在控制体积上应用热平衡可得出附带的温度方程。这些方程式适用于压铸模狭窄部分的近似流动和凝固。通过将结果与从商业软件FLOW3D®获得的结果以及实际压铸零件进行比较，验证了数值算法。通过测量SDAS（二次枝晶臂间距）来验证凝固特性。一项参数化研究探索了通道中金属流动长度对通道厚度，入口金属速度和壁温等因素的依赖性。所提出的算法已成功实现，大大节省了CPU时间。

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