Mixing Study on Different Pineapple Mixer Designs - Simulation Results 1
Sprache des Vortragstitels:
ANTEC Detroit 2019
Sprache des Tagungstitel:
Mixing is an important elementary step in polymer processing to achieve the required melt quality. In this work three-dimensional simulations were carried out investigating the mixing behavior of polymer melt flow through different pineapple mixers. We compared the mixing of a common pineapple mixer with channels arranged with ?? 1 = 45° and ?? 2 = 135° with two scientifically designed pineapple mixers with both angles ?? less than 90° . The scientifically designed pineapple mixers were originally proposed and have been practiced by Prof. C. Chung. The axial velocity field, pressure consumption and viscous dissipation are evaluated. Further we investigated the distribution of the flow through the different channel directions. Axial distributive mixing is analyzed by means of the residence time distribution and its normalized variance. Cross-channel mixing is investigated by means of the scale-of-segregation. Our simulations show that the scientifically design pineapple mixers show considerably better mixing than the common pineapple mixer.