双螺杆挤出过程数值模拟研究进展

Research Progress in Numerical Simulation of Twin⁃screw Extrusion Process

在聚合物的双螺杆挤出过程的研究中,采用数值模拟的方法可以克服传统实验方法的局限,可为挤出机的设计加工提供参考。回顾了近年来国内外对双螺杆挤出过程数值模拟的研究成果,介绍了一维数学模型和三维数学模型对挤出过程进行数学描述的优缺点,从双螺杆挤出机内部的流场特性、瞬态混合性能、停留时间分布以及反应挤出等方面综述了相关研究进展,并对双螺杆挤出过程数值模拟的今后发展方向进行了展望。

In the study on twin⁃screw extrusion process of polymers,the numerical simulation method can overcome the limitations of traditional experimental methods and provide important guidance for design and processing of twin⁃screw extruder.This paper reviewed the research progress in the numerical simulation of twin⁃screw extrusion process at home and abroad in recent years,and also introduced the advantages and disadvantages of mathematical description of the extru⁃sion process by the one⁃dimensional mathematical model and three⁃dimensional mathematical model.The relevant re⁃search progress was summarized in the aspects of flow field characteristics,transient mixing performance,residence time distribution and reactive extrusion in the twin⁃screw extruder.Moreover,the future development direction of the numeri⁃cal simulation of twin⁃screw extrusion process was prospected.