Numerical Simulation of Chaotic Mixing in Single Screw Extruders with Different Baffle Heights
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B.-P. Xu
Abstract
A kind of discontinuous baffle, which had the same length as the non-baffle zone distance, was inserted in the unwound channel of a single screw extruder to enhance mixing in the screw channel. The periodic unit of the flow channel was modeled as a dynamic system of complex duct flow. The finite volume method was used to solve the three-dimensional flow of purely viscous non-Newtonian fluid. Fluid particle tracking was performed by a fourth-order Runge–Kutta scheme. The effect of the baffle height on the mixing kinematics was investigated numerically. Poincaré sections were applied to reveal the different patterns and sizes of the KAM tubes. Distributive mixing was then visualized by the evolution of passive tracers initially located at different positions. The variance index and residence time distribution (RTD) were used to evaluate the statistical results. Among the four test cases, the results showed that the case with the baffle height equal to the screw depth had the largest chaotic mixing region, but the shortest mean residence time and the narrowest broadening of RTD under the same pressure gradient.
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© 2016, Carl Hanser Verlag, Munich
Artikel in diesem Heft
- Contents
- Contents
- Regular Contributed Articles
- Influence of Melt-Mixing Process Conditions on Mechanical Performance of Organoclay/Fluoroelastomer Nanocomposites
- Melt Creep Recovery of Polyamide 6 and Polypropylene Nanocomposites Blended with Layered Silicate
- Dielectric Behavior of OPEFB Reinforced Polycaprolactone Composites at X-Band Frequency
- Numerical Modeling of Bubble Growth in Microcellular Polypropylene Produced in a Core-Back Injection Process Using Chemical Blowing Agents
- Numerical Simulation and Experimental Validation of Granite Powder Filled Jute Epoxy Composite for Slurry Jet Erosive Wear
- Rheological Modeling of Polymeric Melts in Extruders upon Two-Dimensional Shear Flow
- Experimental Investigation on Curing Stress in Polymer Composite Using Digital Gradient Sensing Technique
- Experimental and Numerical Investigation of Shrinkage and Warpage of a U-Shaped Injection Molded Part
- Modeling for Starve Fed/Flood Fed Mixing Single-Screw Extruders
- The Comparative Study of Different Mixing Methods for Microcrystalline Cellulose/Polyethylene Composites
- Fabrication of Superhydrophobic Polyethylene Parts by Rotomolding
- Numerical Simulation of Chaotic Mixing in Single Screw Extruders with Different Baffle Heights
- PPS News
- PPS News
- Seikei Kakou Abstracts
- Seikei-Kakou Abstracts
Artikel in diesem Heft
- Contents
- Contents
- Regular Contributed Articles
- Influence of Melt-Mixing Process Conditions on Mechanical Performance of Organoclay/Fluoroelastomer Nanocomposites
- Melt Creep Recovery of Polyamide 6 and Polypropylene Nanocomposites Blended with Layered Silicate
- Dielectric Behavior of OPEFB Reinforced Polycaprolactone Composites at X-Band Frequency
- Numerical Modeling of Bubble Growth in Microcellular Polypropylene Produced in a Core-Back Injection Process Using Chemical Blowing Agents
- Numerical Simulation and Experimental Validation of Granite Powder Filled Jute Epoxy Composite for Slurry Jet Erosive Wear
- Rheological Modeling of Polymeric Melts in Extruders upon Two-Dimensional Shear Flow
- Experimental Investigation on Curing Stress in Polymer Composite Using Digital Gradient Sensing Technique
- Experimental and Numerical Investigation of Shrinkage and Warpage of a U-Shaped Injection Molded Part
- Modeling for Starve Fed/Flood Fed Mixing Single-Screw Extruders
- The Comparative Study of Different Mixing Methods for Microcrystalline Cellulose/Polyethylene Composites
- Fabrication of Superhydrophobic Polyethylene Parts by Rotomolding
- Numerical Simulation of Chaotic Mixing in Single Screw Extruders with Different Baffle Heights
- PPS News
- PPS News
- Seikei Kakou Abstracts
- Seikei-Kakou Abstracts
