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首页> 外文期刊>Finite elements in analysis & design >Numerical simulation of three dimensional non-Newtonian free surface flows in injection molding using ALE finite element method
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Numerical simulation of three dimensional non-Newtonian free surface flows in injection molding using ALE finite element method

机译：用ALE有限元法数值模拟注射成型中的三维非牛顿自由面流动。

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摘要

This paper presents a scheme for numerical simulation of non-Newtonian fluid flows in three-dimensional injection molding process using arbitrary Lagrangian-Eulerian (ALE) finite element method. The proposed scheme is based on the pressure-stabilized fractional step algorithm for incompressible Navier-Stokes equations. In light of the ALE description, the moving free surface is accurately tracked in a self-adaptive manner by introduction of the moving least square (MLS) surface fitting method to fully determine the movement of the nodes on the moving free surface, meanwhile the mesh distortions are effectively alleviated. By virtue of the ALE method, a local remeshing strategy is developed for the mesh regeneration frequently required in moving free surface flow problems, so that the interpolation errors due to the mesh regeneration process are minimized and occur only limited to some local regions, and the computational cost for the remeshing process is reduced decisively. The numerical examples of three dimensional injection molding flows are presented to demonstrate the capabilities of the proposed numerical scheme.
机译：本文提出了一种使用任意拉格朗日-欧拉（ALE）有限元方法对三维注射成型过程中非牛顿流体流动进行数值模拟的方案。提出的方案基于不可压缩的Navier-Stokes方程的压力稳定分数步算法。根据ALE的描述，通过引入移动最小二乘（MLS）曲面拟合方法以自适应方式准确跟踪移动自由表面，从而完全确定节点在移动自由表面上的运动，同时进行网格划分失真得到有效缓解。借助ALE方法，针对移动自由表面流问题中经常需要的网格再生开发了一种局部重新网格化策略，从而将由于网格再生过程而引起的插值误差减至最小，并且仅限于某些局部区域，并且决定性地减少了重新设计过程的计算成本。给出了三维注塑成型流程的数值示例，以证明所提出的数值方案的功能。

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  • 来源
    《Finite elements in analysis & design》 |2010年第7期|p.551-562|共12页
  • 作者

    Xuanping Wang; Xikui Li;

  • 作者单位

    The State key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, People's Republic of China;

    The State key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, People's Republic of China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    ALE; free surface flow; moving least square; local remeshing; pressure stabilization;

    机译：ALE;自由表面流动;移动最小二乘;本地重新包装;压力稳定;

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