Experiments on Characteristic Deformation and Breakup Behaviors of an Immiscible Drop in a Screw Channel Flow
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H. S. Jun
Abstract
Deformation and breakup mechanisms of an immiscible drop were investigated experimentally in a screw channel flow, which mimics the flow in the metering section of the single screw extruder. It was observed that the deformation/breakup mechanisms are far distinct from the well-known routes for the linear flow, mainly because of the complex flow history that can be characterized by the repetition of strong/weak shear, the continuously varying shear direction and the acceleration/deceleration. The experimental observations include: comet-like thread formation with the large bulbous head and the long narrow tail; the initiation of the breakup at the entrance of the low-shear zone; breakup by asymmetric end pinching; breakup by the growth of the capillary wave, propagating from the tail toward the head; monotonically decreasing droplet size distribution from the head to tail. The mechanism for the comet-like thread formation has been investigated by using the numerically obtained flow field.
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© 2004, Carl Hanser Verlag, Munich
Articles in the same Issue
- Contents
- Contents
- Editorial
- Polymer Processing Society Annual Meeting 21
- Screw Extrusion
- Parametric Study of the Mixing Efficiency in a Kneading Block Section of a Twin-screw Extruder
- Experiments on Characteristic Deformation and Breakup Behaviors of an Immiscible Drop in a Screw Channel Flow
- Die Extrusion
- Flow Balancing in Extrusion Dies for Thermoplastic Profiles
- Fiber
- Effects of Sparse Long Chain Branching on the Spinning Stability of LLDPEs
- Dry Spinning of Polymer Fibers in Ternary Systems
- Dry Spinning of Polymer Fibers in Ternary Systems
- Studies on Methacrylate-hydroethyl Methacrylate Oil-absorptive Fiber
- Film
- Numerical and Physical Modeling of Polymer Crystallization
- Numerical and Physical Modeling of Polymer Crystallization
- Modeling
- Study on Viscoelastic Behavior and Extrusion Blow Molding Processability of PP/PE Blends
- Simulation of Thermal Phenomena on the Interface Molten Polymer/Powder Polymer During Rotational Molding
- Effect of Mold Temperature on Structure and Property Variations of PBT Injection Moldings in the Thickness Direction
- Tensile and Flexural Properties of β-Nucleated Polypropylenes
- Predicting the Long-term Creep Behavior of Plastics Using the Short-term Creep Test
- PPS News
- PPS News
Articles in the same Issue
- Contents
- Contents
- Editorial
- Polymer Processing Society Annual Meeting 21
- Screw Extrusion
- Parametric Study of the Mixing Efficiency in a Kneading Block Section of a Twin-screw Extruder
- Experiments on Characteristic Deformation and Breakup Behaviors of an Immiscible Drop in a Screw Channel Flow
- Die Extrusion
- Flow Balancing in Extrusion Dies for Thermoplastic Profiles
- Fiber
- Effects of Sparse Long Chain Branching on the Spinning Stability of LLDPEs
- Dry Spinning of Polymer Fibers in Ternary Systems
- Dry Spinning of Polymer Fibers in Ternary Systems
- Studies on Methacrylate-hydroethyl Methacrylate Oil-absorptive Fiber
- Film
- Numerical and Physical Modeling of Polymer Crystallization
- Numerical and Physical Modeling of Polymer Crystallization
- Modeling
- Study on Viscoelastic Behavior and Extrusion Blow Molding Processability of PP/PE Blends
- Simulation of Thermal Phenomena on the Interface Molten Polymer/Powder Polymer During Rotational Molding
- Effect of Mold Temperature on Structure and Property Variations of PBT Injection Moldings in the Thickness Direction
- Tensile and Flexural Properties of β-Nucleated Polypropylenes
- Predicting the Long-term Creep Behavior of Plastics Using the Short-term Creep Test
- PPS News
- PPS News
