Numerical Simulations and Experiments in a Double-Couette Flow Geometry
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M. Teverovskiy
Abstract
Modeling of batch and continuous twin rotor mixers, widely used in polymer processing, is a challenging computational problem. One approach to understand the mechanics of flow in twin rotor mixers is to simplify the geometry of the rotors by using cylindrical rotors. This geometry is referred to as the double-Couette geometry. Advantages of the double-Couette geometry are a simple symmetrical mesh design and no time-dependent flow boundaries. In this work, we used the double-Couette geometry to study the mechanics of flow and mixing efficiency in laminar and turbulent flow regimes. Flow visualization experiments utilizing a fluorescent dye were carried out in a transparent flow cell. A fluid dynamics analysis package—FIDAP, based on the finite element method, was used for the flow simulations in laminar and turbulent flow regimes. Numerical results showed good agreement with the experimental data. We attempted a qualitative comparison for distributive mixing efficiency in laminar and turbulent flow regimes in light of the spreading of a tracer line (dye) in the matrix. The analysis pointed out to differences in the mixing mechanisms encountered in different flow regimes.
© 2000, Carl Hanser Verlag, Munich
Articles in the same Issue
- Editorial
- Third of a Series: Pioneering Polymer Industry Developments — The First Successful Mathematical-Computer Modeling of A Complex Industrial Process: Toyobo and Melt Spinning
- Screw Extrusion / Mixing
- Polymer Flow Velocity in the Helical Channel in Dependence of a Coordinate System
- Non-Isothermal Transient Startup of A Starved Flow Modular Co-Rotating Twin Screw Extruder
- Numerical Simulations and Experiments in a Double-Couette Flow Geometry
- Dynamic Analysis of Melting in Injection Extruder
- Extrusion Die
- Production of Pipe with Uniform Wall Thickness: How to Compensate for Gravity Sag
- Fiber and Film
- Assessment of LDPE Melt Strength by Use of Rheotens Mastercurves
- Molding
- Analysis of Flow and Heat Transfer in Liquid Composite Molding
- Solidification Criterion on Shrinkage Predictions for Semi-crystalline Injection Moulded Samples
- Polymer Melt Rheology at High Shear Rates
- Factors Affecting the Stability of Gas Penetration in Gas Assist Injection Molded Bifurcation Parts
- Transient Polymer Flow Rate in Injection Mold Filling
- Flow Analysis of Injection-Press Molding Process
- Properties of Injection Molded In Situ Composites Based on PPS and a Melt Processable Glass
- A New Approach in Offline-Optimization of the Injection Molding Process
Articles in the same Issue
- Editorial
- Third of a Series: Pioneering Polymer Industry Developments — The First Successful Mathematical-Computer Modeling of A Complex Industrial Process: Toyobo and Melt Spinning
- Screw Extrusion / Mixing
- Polymer Flow Velocity in the Helical Channel in Dependence of a Coordinate System
- Non-Isothermal Transient Startup of A Starved Flow Modular Co-Rotating Twin Screw Extruder
- Numerical Simulations and Experiments in a Double-Couette Flow Geometry
- Dynamic Analysis of Melting in Injection Extruder
- Extrusion Die
- Production of Pipe with Uniform Wall Thickness: How to Compensate for Gravity Sag
- Fiber and Film
- Assessment of LDPE Melt Strength by Use of Rheotens Mastercurves
- Molding
- Analysis of Flow and Heat Transfer in Liquid Composite Molding
- Solidification Criterion on Shrinkage Predictions for Semi-crystalline Injection Moulded Samples
- Polymer Melt Rheology at High Shear Rates
- Factors Affecting the Stability of Gas Penetration in Gas Assist Injection Molded Bifurcation Parts
- Transient Polymer Flow Rate in Injection Mold Filling
- Flow Analysis of Injection-Press Molding Process
- Properties of Injection Molded In Situ Composites Based on PPS and a Melt Processable Glass
- A New Approach in Offline-Optimization of the Injection Molding Process
