化工进展2025，Vol.44Issue(7)：3748-3756,9.DOI:10.16085/j.issn.1000-6613.2024-0930
SPH-DEM耦合模拟方法在啮合型双螺杆挤出机中的应用
Application of SPH-DEM coupling simulation method in meshing twin-screw extruder
杨文明 1谢林生 1王玉 1马玉录 1李果1
作者信息
- 1. 华东理工大学机械与动力工程学院,上海 200237
- 折叠
摘要
Abstract
In order to investigate the flow of solid-liquid two-phase material,the force on the particle,and the mixing process of two-phase material in the meshing twin-screw extruder,smooth particle hydrodynamics(SPH)coupled with discrete element method(DEM)was used in this paper for simulation.Because of its meshless nature,SPH method could effectively overcome the difficulty of meshing on the special structure of meshing twin-screw by finite element method.Based on the established fluid cell model,fluid viscosity model,solid particle model and particle contact model,the flowing and mixing process of solid-liquid two-phase material inside the screw section and kneader block section of the meshing twin-screw was simulated,and the force behavior and interaction of solid-liquid two-phase material in the conveying section and mixing section of the extruder were analyzed,respectively.The simulation results showed that the flow mode of the mixture of fluid-coated solid particles in the extruder was to move slowly along the axial direction while rotating with the screw in the circumferential direction,and the mixture reached the exit after 12s of feeding.The force of mixture in the kneader block section was significantly larger than that in the screw section,and the maximum normal force,tangential force and fluid force on the particle all occurred in the region of the first kneader disk.The filling degree and mixing effect of solid-liquid two-phase material in the kneader block section were higher than that in the screw section,and the Lacey mixing index of mixed material was up to 0.9.关键词
SPH-DEM耦合方法/啮合型双螺杆/固液混合/颗粒受力/多相流/计算机模拟Key words
SPH-DEM coupling method/meshing twin-screw/solid-liquid mixing/force on the particle/multiphase flow/computer simulation分类
化学化工引用本文复制引用
杨文明,谢林生,王玉,马玉录,李果..SPH-DEM耦合模拟方法在啮合型双螺杆挤出机中的应用[J].化工进展,2025,44(7):3748-3756,9.
