Journal
AICHE JOURNAL
Volume 62, Issue 7, Pages 2563-2569Publisher
WILEY
DOI: 10.1002/aic.15228
Keywords
polymer processing; food processing; extrusion; distributive mixing; twin-screw extruder; simulation
Categories
Funding
- JSPS KAKENHI [26400433, 24656473, 15H04175]
- Grants-in-Aid for Scientific Research [15H04175, 26400433, 24656473] Funding Source: KAKEN
Ask authors/readers for more resources
Understanding the mixing capability of mixing devices based on their geometric shape is an important issue both for predicting mixing processes and for designing new mixers. The flow patterns in mixers are directly connected with the modes of the local strain rate, which is generally a combination of elongational flow and planar shear flow. We develop a measure to characterize the modes of the strain rate for general flow occurring in mixers. The spatial distribution of the volumetric strain rate (or non-planar strain rate) in connection with the flow pattern plays an essential role in understanding distributive mixing. With our measure, flows with different types of screw elements in a twin-screw extruder are numerically analyzed. The difference in flow pattern structure between conveying screws and kneading disks is successfully characterized by the distribution of the volumetric strain rate. The results suggest that the distribution of the strain rate mode offers an essential and convenient way for characterization of the relation between flow pattern structure and the mixer geometry. (c) 2016 American Institute of Chemical Engineers
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available