中文摘要：

利用POLYFLOW软件分别对传统2：1剪切型转子和新型4：1剪切转子密炼机的速度场进行有限元模拟。通过将速度矢量对时间进行积分获得流场内大量材料质点的运动轨迹,对胶料的动态分布混合过程进行可视化分析。在获得大量粒子轨迹的基础上,利用POLYSTAT模块进行流场的统计分析,采用分离尺度、拉伸长度、瞬时效率、时间平均效率和混合指数对两种转子的混合效率进行评价分析。统计结果表明,新型4：1转子在保持传统转子强分散混合能力的基础上,分布混合能力大幅度提高。

英文摘要：

The velocity fields of traditional 2：1 rotor and new 4：1 rotor of internal mixer were simulated using finite element POLYFLOW software.The resulted velocity profiles were used to calculate the paths of material points in order to analyze the distributive mixing and overall efficiency of the mixer over time.Visual inspection of the material points distribution,scale of segregation,mean length of stretch and mixing efficiency were used to evaluate the mixing effectiveness of these two rotors.Statistical results showed that,the new shearing-type 4：1 rotor was more effective and efficient than traditional 2：1 rotor in distributive mixing while keeping high efficiency of the dispersive mixing.