| Autor: |
X. Z. Zhu, G. Wang, Y. D. He, Z. F. Cheng |
| Jazyk: |
angličtina |
| Rok vydání: |
2013 |
| Předmět: |
|
| Zdroj: |
Advances in Mechanical Engineering, Vol 5 (2013) |
| Druh dokumentu: |
article |
| ISSN: |
1687-8132 |
| DOI: |
10.1155/2013/236389 |
| Popis: |
There is a special circumfluence in the center region of cross-section for a tri-screw extruder. To study the effect of the dynamic center region on the flow and mixing mechanism of the tri-screw extruder, 2D finite element modeling was used to reduce the axial effects. Based on the particle tracking technology, the nonlinear dynamics of a typical particle motions in the center region was carried out and the mixing process in the tri-screw extruder was analyzed with Poincaré maps. Moreover, mixing evaluations of the tri-screw and twin-screw extruders were analyzed and compared. The results show that there are many multiple and fractional excitation frequencies in the Fast Fourier Transform (FFT) spectrums, and it shows a chaotic motion in the center region. Poincaré section maps in the tri-screw show the better particles diffusive ability than those in the twin-screw extrude due to the excellent diffluent ability. Furthermore, the tri-screw extruder has the better dispersive, distributive mixing abilities and stretching mixing efficiency than the twin-screw extruder in the cross-section. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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