Estimation of Residence Time Distribution in two Elements of a Ko-Kneader
-
M. Mehranpour
Abstract
An attempt has been made to estimate the resident time distribution (RTD) in the KE and EZ elements of the Buss Ko-Kneader. The effects of both rotating and reciprocating motions of the screw were taken in to account in the flow analysis as well as in a simplified mathematical model developed for the RTD estimations. The basic function employed in the present work was F(t) = ∫ f(t) dt, where f(t) dt defined as dq/q was evaluated as a function of the channel depth. Due to the periodic nature of the system averages of minimum resident time was considered as tmin in the above equation. The computation of the model was carried out to evaluated the F(t) as a function of time for both KE and EZ elements. These results demonstrate that the residence time distribution in KE element is slightly narrower than that in EZ element.
© 2002, Carl Hanser Verlag, Munich
Articles in the same Issue
- Editorial
- Twelfth of a Series: Father of Synthetic Fiber Industry Wallace Hume Carothers
- Special Paper
- The Matching of Experimental Polymer Processing Flows to Viscoelastic Numerical Simulation
- Single and Twin Screw Extrusion
- Polymer Pellet Flow out of the Hopper into the First Section of a Single Screw
- Estimation of Residence Time Distribution in two Elements of a Ko-Kneader
- Flow Characteristics of Screws and Special Mixing Enhancers in a Co-rotating Twin Screw Extruder
- Reactive Extrusion
- Bulk Polymerization of ε-Caprolactone in an Internal Mixer and in a Twin Screw Extruder
- Die Extrusion
- Flow Instabilities of Linear PE in Capillary Dies
- In-line Ultrasonic Monitoring of Filler Dispersion during Extrusion
- Fibers and Film
- Birefringence and Mechanical Property Development in Melt Spinning Cyclopolyolefin Filaments
- Injection Molding
- An Empirical Study of the Surface Blush in Gas-Assisted Injection Molded Parts
- Use of the Fast-cool pVT Data for Shrinkage Analysis in Injection Molding
- Composite Processing
- Impregnation Behaviors in Composite Processing
Articles in the same Issue
- Editorial
- Twelfth of a Series: Father of Synthetic Fiber Industry Wallace Hume Carothers
- Special Paper
- The Matching of Experimental Polymer Processing Flows to Viscoelastic Numerical Simulation
- Single and Twin Screw Extrusion
- Polymer Pellet Flow out of the Hopper into the First Section of a Single Screw
- Estimation of Residence Time Distribution in two Elements of a Ko-Kneader
- Flow Characteristics of Screws and Special Mixing Enhancers in a Co-rotating Twin Screw Extruder
- Reactive Extrusion
- Bulk Polymerization of ε-Caprolactone in an Internal Mixer and in a Twin Screw Extruder
- Die Extrusion
- Flow Instabilities of Linear PE in Capillary Dies
- In-line Ultrasonic Monitoring of Filler Dispersion during Extrusion
- Fibers and Film
- Birefringence and Mechanical Property Development in Melt Spinning Cyclopolyolefin Filaments
- Injection Molding
- An Empirical Study of the Surface Blush in Gas-Assisted Injection Molded Parts
- Use of the Fast-cool pVT Data for Shrinkage Analysis in Injection Molding
- Composite Processing
- Impregnation Behaviors in Composite Processing
