| Estimation of Vortex Region Length of Tread Compound in Front Zone of Extruder Entrance |
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| DOI： |
| Key Words: tread componnd；convergent flow；circle flow；extruder enetance；vortex region length |
| Author Name | Affiliation | | Liang Jizhao | South China University of Science and Technology |
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| Abstract: |
| The circle flow of viscoelastic fluid in the front zone of extruder entrance before running through a sharply contracted runner was investigated. Based on the ealier work，an equation for predicting the vortex region length LV was proposed. The value of LV during capillary extrusion of tread compund was extimated using the said equation. It was found that the LV/reservoir diameter ratio was about 0.14～0.32，and decreased with the rise of temperature and increased with the rise of shear rate. |
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