Numerical analysis of a new mound-shaped extensional mixing element designed based on a sine curve in single-screw extrusion
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Hezhi He
Abstract
The rapid development of polymer blends and nanocomposites has put forward new requirements for the mixing performance of extruders. In comparison with shear flow field, extensional flow field has been shown to have unique advantages in improving dispersive mixing performance and reducing energy consumption. However, building an extensional flow field in a conventional single-screw extruder remains challenging. In this work, a new mound-shaped extensional mixing element (M-EME) was designed based on the geometric characteristics of a sine curve. To investigate the effect of this M-EME on the mixing properties of a conventional single-screw extruder, a numerical simulation analysis of this M-EME was performed. The results showed that the proportion of the region with a mixing index greater than 0.55 in the M-EME was higher than 43 %, and that the highest mixing index of the M-EME reached around 0.9, confirming the dominance of the extensional flow field in the M-EME. Moreover, it was observed that the changes in amplitude and period of the sine function have no significant effect on the distribution of the mixing index. The findings from this work provide a viable way to generate extensional flow fields in conventional screw extruders.
Funding source: China Postdoctoral Science Foundation
Award Identifier / Grant number: 2022M721181
Funding source: Opening Project of Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing
Award Identifier / Grant number: 2022kfkt05
Funding source: National Natural Science Foundation of China
Award Identifier / Grant number: 52203035
Award Identifier / Grant number: 51873075
Funding source: Science and Technology Planning Project of Guangzhou City
Award Identifier / Grant number: 2023A04J1579
Funding source: National Key Research and Development Program of China
Award Identifier / Grant number: 2019YFC1908202
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Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: Z.Z. acknowledges financial support from the National Natural Science Foundation of China (52203035), the China Postdoctoral Science Foundation (2022M721181), Science and Technology Planning Project of Guangzhou City (2023A04J1579), and the Opening Project of Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing, South China University of Technology, China (2022kfkt05). H.H. acknowledges the support from the National Natural Science Foundation of China (51873075), and the National Key Research and Development Program of China (Grant No. 2019YFC1908202).
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Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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- Numerical analysis of a new mound-shaped extensional mixing element designed based on a sine curve in single-screw extrusion
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Articles in the same Issue
- Frontmatter
- Research Articles
- Mechanical and dielectric properties of Cissus Quadrangularis fiber-reinforced epoxy/TiB2 hybrid composites
- Numerical investigation of pressure drop within isothermal capillary rheometry for viscous and viscoelastic fluids
- The effect of extensional viscosity on the core structure of fiber orientation for injection-molded fiber composites
- Numerical analysis of a new mound-shaped extensional mixing element designed based on a sine curve in single-screw extrusion
- Effects of polymeric microcapsules on self-healing composites reinforced with carbon fibers: a comparative study
- Vulcanization kinetics and mechanical properties of filled ethylene-vinyl acetate copolymer rubber composites
- Experimental analysis of localized hybridization by means of adding woven polyester strip
- Molecular design of soluble poly(amide-imide) with high char yield for flame retardant epoxy resin
- Investigation of erosion wear performance and mechanism of mold materials
