FINITE-ELEMENT ANALYSIS OF MIXING PHENOMENA IN TANGENTIAL TWIN-SCREW EXTRUDERS FOR NON-NEWTONIAN FLUIDS
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- Title
- FINITE-ELEMENT ANALYSIS OF MIXING PHENOMENA IN TANGENTIAL TWIN-SCREW EXTRUDERS FOR NON-NEWTONIAN FLUIDS
- Authors
- SASTROHARTONO, T; KWON, TH
- Date Issued
- 1990-12
- Publisher
- JOHN WILEY & SONS LTD
- Abstract
- A flow analysis of non-Newtonian fluids inside co-rotating tangential twin-screw extruders is presented with the emphasis on mixing phenomena. A new simplified approach was proposed in modelling the flow, i.e. the flow in twin-screw extruders was considered as a sequence of flows in two regions: (i) the translation region (T-region), similar to a single-screw extruder; and (ii) the mixing region (M-region), representing the central part of twin-screw extruders. The flow has been assumed to be isothermal, steady-state and creeping. Furthermore, it was assumed that the velocity field does not change significantly in one co-ordinate (i.e. the down-channel direction in the case of the T-region and the axial direction in the case of the M-region) as compared with the other co-ordinate directions. Accordingly, a quasi-three-dimensional finite element method has been developed to analyse the flows in both regions. The mixing mechanisms inside the T-and M-regions were analysed and the inter-channel mixing in the M-region was quantified. The residence time distribution and performance characteristic of a single screw with a self-wiping profile were also calculated.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/27941
- DOI
- 10.1002/nme.1620300803
- ISSN
- 0029-5981
- Article Type
- Article
- Citation
- INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING, vol. 30, no. 8, page. 1369 - 1383, 1990-12
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