Numerical simulation on the mixing behavior of double-wave screw under speed sinusoidal pulsating enhancement induced by differential drive
Author:
Liu Tian-lei12, Du Yao-xue3, He Xian-yun2
Affiliation:
1. Polymer Processing Research Laboratory , Nanchang University , Nanchang 330031 , China 2. Department of Mechanical Engineering , Guangdong Polytechnic of Industry and Commerce , Guangzhou 510510 , China 3. School of Intelligent Manufacturing , Wuyi University , Jiangmen 529020 , China
Abstract
Abstract
A novel speed sinusoidal pulsating system is designed by applying differential drive, which is loaded on the plasticizing screw in an extruder or in an injection molding machine. With the CFD software ANSYS POLYFLOW 19.2, this paper builds simplified physical and mesh models for the double wave screw unit, carries out numerical simulation by using particle tracing manner, and finally analyses comparatively the mixing behavior of the wave screw mixing unit with and without sinusoidal pulsating field. It is found that the mixing screw unit with the superimposed excitation field takes on lower transportation efficiency and a descending melt pressure, while there are different reactions on the various pulsating amplitude and frequency for the max shear rate and mixing index. On the other hand, the introducing pulsating field can strengthen the shear field and gain a higher mixing efficiency. The results are of great importance and reference for improving the plasticizing performance and engineering application of the speed pulsating system.
Funder
National Natural Science Foundation of China Special Project of College-enterprise Cooperation of Guangdong Polytechnic of Industry and Commerce Scientific Research Innovation Team Project of Guangdong Polytechnic of Industry and Commerce
Publisher
Walter de Gruyter GmbH
Subject
Materials Chemistry,Polymers and Plastics,General Chemical Engineering
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