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Die shape optimization for extrudate swell using feedback control
Journal of Non-Newtonian Fluid Mechanics ( IF 3.1 ) Pub Date : 2021-04-30 , DOI: 10.1016/j.jnnfm.2021.104552
M.M.A. Spanjaards , M.A. Hulsen , P.D. Anderson

In this paper we propose a novel approach to solve the inverse problem of three-dimensional die design for extrudate swell, using a real-time active control scheme. To this end, we envisioned a feedback connection between the corner-line finite element method, used to predict the positions of the free surfaces of the extrudate, and the controller. The corner-line method allows for local mesh refinement and transient flow to be taken into account (Spanjaards et al., 2019). We show the validity of this method by showing optimization results for 2D axisymmetric extrusion flows of a viscoelastic fluid for different Weissenberg numbers. In 3D we first give a proof of concept by showing the results of a Newtonian fluid exiting dies with increasing complexity in shape. Finally, we show that this method is able to obtain the desired extrudate shape of extrudates of a viscoelastic fluid for different Weissenberg numbers and different amounts of shear-thinning.



中文翻译:

使用反馈控制优化挤出物溶胀的模具形状

在本文中,我们提出了一种新颖的方法,使用实时主动控制方案来解决挤出物溶胀的三维模具设计逆问题。为此,我们设想了用于预测挤出物自由表面位置的角线有限元方法与控制器之间的反馈连接。拐角线方法允许考虑局部网格细化和瞬态流动(Spanjaards et al。,2019)。通过显示针对不同Weissenberg数的粘弹性流体的2D轴对称挤压流动的优化结果,我们证明了该方法的有效性。在3D中,我们首先通过显示形状复杂度不断增加的牛顿流体出口模具的结果来提供概念验证。最后,

更新日期:2021-05-04
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