NUMERICAL STUDY OF THE NON-ISOTERMAL FLOW OF THE POLYMER MELT WITH UNDERMELTED GRANULES IN THE CONICAL ANNULAR CHANNEL OF A DISC EXTRUDER
DOI:
https://doi.org/10.18664/1994-7852.205.2023.288816Ключові слова:
disk extruder, polymers, conical annular channels, modeling, non-isothermal processes, meltingАнотація
The aim of this study is to determine the regularities of the non-isothermal flow process of the melt in a conical annular channel, taking into account the heating and melting of granules due to dissipation energy. A higher rotation frequency contributes to intensive heating of the melt and a more pronounced reduction in granule volume. It has been shown that granules are melted in the conical channel. Tangential velocity components and shear velocities decrease as the cone radius diminishes, and the effective viscosity of the melt depends on temperature and shear rate. Factors affecting the pressure drop in the channel are presented. The results of the work are depicted in graphs at disk speeds of 120 and 150 rpm. The same calculation procedure is applied for the conical annular channel as for the cylindrical annular channel. The only difference is that for the cylindrical annular channel, the longitudinal coordinate z is used, whereas for the conical annular channel, the longitudinal coordinate z is used. Thus, the introduction of orthogonal coordinates significantly simplified the overall calculation procedure for processes occurring in the homogenization zone.
Посилання
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