混合(物理)
塑料挤出
材料科学
停留时间分布
机械
分配律
工作(物理)
流量(数学)
跟踪(教育)
计算流体力学
计算机模拟
机械工程
复合材料
数学
物理
工程类
量子力学
心理学
教育学
纯数学
作者
Xianming Zhang,Lianfang Feng,Wen‐Xing Chen,Guo‐Hua Hu
摘要
Abstract This work aims at simulation by particle tracking the local residence time distributions (RTDs) of a co‐rotating twin‐screw extruder using computational fluid dynamics. Simulated results follow reasonably well the trend of experimental results obtained by an in‐line measuring instrument for different screw configurations and feed rates. To analyze the distributive mixing performance and overall efficiency of different types of kneading discs (KDs), mixing parameters such as area stretch ratio, instantaneous efficiency, and time‐average efficiency are calculated. Among KDs with stagger angles 45°, 60°, and 90°, the 90/10/64 with disc gaps is most efficient in terms of distributive mixing. The effects of the disc width and disc gap on the local RTD and distributive mixing are also discussed. This provides a numerical tool for assessing point‐by‐point information on the local RTD, flow, and mixing along the screw extruder. POLYM. ENG. SCI., 2009. © 2009 Society of Plastics Engineers
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