期刊
COMPUTERS & FLUIDS
卷 190, 期 -, 页码 322-336出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.compfluid.2019.06.028
关键词
Co-rotating twin-screw extruder; Snapping reference mesh update method; Space-time finite elements; Mesh update method; Boundary-conforming finite elements; Temperature-dependent plastic melt
资金
- Saudi Basic Industries Corporation
We present a boundary-conforming space-time finite element method to compute the flow inside co-rotating, self-wiping twin-screw extruders. The mesh update is carried out using the newly developed Snapping Reference Mesh Update Method (SRMUM). It allows to compute time-dependent flow solutions inside twin-screw extruders equipped with conveying screw elements without any need for re-meshing and projections of solutions - making it a very efficient method. We provide cases for Newtonian and non-Newtonian fluids in 2D and 3D, that show mesh convergence of the solution as well as agreement to experimental results. Furthermore, a complex, unsteady and temperature-dependent 3D test case with multiple screw elements illustrates the potential of the method also for industrial applications. (C) 2019 Elsevier Ltd. All rights reserved.
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