Gröger Benjamin, Wang Jingjing, Bätzel Tim, Hornig Andreas, Gude Maik
Institute of Lightweight Engineering and Polymer Technology, Technische Universität Dresden, Holbeinstraße 3, 01307 Dresden, Germany.
Materials (Basel). 2022 Oct 17;15(20):7241. doi: 10.3390/ma15207241.
A virtual test setup for investigating single fibres in a transverse shear flow based on a parallel-plate rheometer is presented. The investigations are carried out to verify a numerical representation of the fluid-structure interaction (FSI), where Arbitrary Lagrangian-Eulerian (ALE) and computational fluid dynamics (CFD) methods are used and evaluated. Both are suitable to simulate flexible solid structures in a transverse shear flow. Comparative investigations with different model setups and increasing complexity are presented. It is shown, that the CFD method with an interface-based coupling approach is not capable of handling small fibre diameters in comparison to large fluid domains due to mesh dependencies at the interface definitions. The ALE method is more suited for this task since fibres are embedded without any mesh restrictions. Element types beam, solid, and discrete are considered for fibre modelling. It is shown that the beam formulation for ALE and 3D solid elements for the CFD method are the preferred options.
本文介绍了一种基于平行板流变仪的用于研究横向剪切流中单根纤维的虚拟测试装置。开展这些研究是为了验证流固耦合（FSI）的数值表示，其中使用并评估了任意拉格朗日 - 欧拉（ALE）和计算流体动力学（CFD）方法。这两种方法都适用于模拟横向剪切流中的柔性固体结构。文中给出了不同模型设置且复杂度不断增加的对比研究。结果表明，与大流体域相比，基于界面耦合方法的CFD方法由于界面定义处的网格依赖性，无法处理小纤维直径的情况。ALE方法更适合这项任务，因为纤维嵌入时没有任何网格限制。在纤维建模中考虑了梁单元、实体单元和离散单元类型。结果表明，ALE的梁公式和CFD方法的三维实体单元是首选选项。
