Simulation of Three-dimensional Complex Flows in Injection Molding Using Immersed Boundary Method
Simulation of Three-dimensional Complex Flows in Injection Molding Using Immersed Boundary Method
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DOI：
10.32604/cmes.2013.094.207
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Qiang Li
中科院分区：
文献类型：
--
作者：
Qiang Li
本文提出了一种模拟三维复杂注塑流动的浸入边界方法，该方法采用水平集函数处理模具的不规则边界。熔体前沿（熔体-空气界面）被捕获，并使用耦合的水平集和流体体积（CLSVOF）方法进行处理。采用非交错网格上的有限体积法求解控制方程，模拟了薄壁和厚壁矩形结晶器内熔体的充型过程。数值结果与已有的数据吻合较好。最后，介绍了三种不同模具的熔体填充工艺，分别研究了同心、偏心和薄圆柱插入的环形通道。实验结果表明，该模型可以成功地观察到所谓的“跑道效应”和气阱现象，证明了该模型对注塑成型复杂流动的适用性。
In this paper, an immersed boundary method (IBM) has been developed to simulate three-dimensional (3D) complex flows in the injection molding process, in which the irregular boundary of mould is treated by a level set function. The melt front (melt-air interface) is captured and treated using the coupled level set and volume of fluid (CLSVOF) method. The finite volume method on the nonstaggered meshes is implemented to solve the governing equations, and the melt filling process is simulated in a rectangular mould with both thickand thin-wall sections. The numerical result shows good agreement with the available data. Finally, the melt filling processes in three different moulds, i.e., ring-shaped channels with concentric, eccentric and thin cylindrical insets, are investigated respectively. It is found that the so-called “race-tracking effect” and air traps phenomena could be observed successfully, which demonstrates the applicability of IBM to complex flows in injection molding.