Parametric study of the mixing efficiency in a kneading block section of a twin-screw extruder
Parametric study of the mixing efficiency in a kneading block section of a twin-screw extruder
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DOI：
10.3139/217.1836
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发表时间：
2004-09-01
影响因子：
1.3
通讯作者：
Avalosse, T
中科院分区：
文献类型：
--
作者：
Alsteens, B;Legat, V;Avalosse, T
双螺杆挤出机通常用于将添加剂分布和分散到聚合物中。挤出机的混合效率在很大程度上取决于混合段捏合块的几何形状。本文采用三维时变有限元计算方法，研究了安装角、圆盘宽度等几何参数的影响，并利用有限元软件Poly-flow得到了计算结果。的鲁棒性和精度的网格叠加技术进行了评估。数值实验所得结论可用于捏合块几何结构的改进。混合效率的评价通过比较的停留时间和总的剪切分布的一个大的虚拟粒子发射在流域。
Twin-screw extruders are often used to distribute and disperse additives into polymers. The mixing efficiency of the extruders highly depends on the geometry of the kneading blocks of the mixing section. In this paper the impact of some geometrical parameters, such as the stagger angle and the width of the discs, are investigated by three dimensional time dependent finite element calculations.Results are obtained with the finite element software Poly-flow. The robustness and the accuracy of the mesh superposition technique is evaluated. It appears that conclusions obtained by the numerical experiments can be used to improve the geometry of the kneading blocks. The mixing efficiency is evaluated by comparing the residence time and the total shear distributions of a large set of virtual particles launched in the flow domain.