Mixing efficiency in a pin mixing section for single-screw extruders
Mixing efficiency in a pin mixing section for single-screw extruders
复制标题
单螺杆挤出机销钉混合部分的混合效率
DOI：
10.1002/pen.10790
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发表时间：
2001
影响因子：
3.2
通讯作者：
K. Koyama
中科院分区：
文献类型：
--
作者：
W. Yao;S. Tanifuji;K. Takahashi;K. Koyama
根据实际配置，对具有不同销钉轴向间隙的销钉混合部分的混合性能进行了非牛顿、非等温的 3D 有限元模拟。混合能力的定量评价是基于流体混合运动学理论。为了了解和比较标准螺杆和销钉混合部分的局部混合性能，计算了 Ottino 提出的局部混合效率分布。此外，还计算了这些混合器的 RTD，以尝试测量混合。两者的积分，即沿从入口到出口的多条颗粒路径的局部混合效率的积分，加上统计处理，称为积分混合效率，从而定量判断连续混合机的总混合能力。计算结果表明销混合部分的混合能力与销的轴向间隙呈非线性相关。最后，将计算结果与我们之前的实验结果进行了比较。
Non-Newtonian, non-isothermal, 3D finite-element simulation of mixing performance in a pin mixing section with different axial gaps in the pins has been carried out according to their realistic configurations. The quantitative evaluation of mixing ability was based on the theory of kinematics of fluid mixing. To learn and to compare the local mixing performance in a standard screw and a pin mixing section, the local mixing efficiency distribution proposed by Ottino was calculated. Also, the RTDs of these mixers were calculated in an attemt to measure mixing. The integration of the two, namely, the integrating local mixing efficiency along a number of particle pathlines from entrance to exit, together with statistical treatment, which was referred as integral mixing efficiency, then gives a quantitative judgment of the total mixing ability of a continuous mixer. The calculated results showed a nonlinear dependence of the mixing ability of a pin mixing section on the axial gap of the pins. Finally, the calculation results were compared with the experimental ones obtained in our previous study.