Deformation Fields and Residence Time Distributions in Polymer Melt Flows
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A. Hannachi
Abstract
In past numerical simulations of polymer melt flows, the flow field has been visualized through velocity vectors and streamlines providing a steady-state Eulerian viewpoint. This work shows that enhanced understanding of flow kinematics can be achieved by calculating the residence time distribution (RTD) of material points through the integration of the known velocity field and by plotting isochrones and the deformation field of fluid elements. Such kinematic patterns provide a Lagrangian viewpoint of the flow and fully describe the history of the elements of the system as they move through the field. In cases with zones of recirculation the period for one revolution is also calculated. Typical examples are shown for such polmyer processing operations as entry flows in contractions, exit flows from dies, calendering and wire-coating coextrusion processes.
© 1990, Carl Hanser Verlag, Munich
Artikel in diesem Heft
- Contents
- Contents
- Original Contributions
- Innovative Extrusion Systems for Advanced Fiber and Film Extrusion
- Influence of Melting Zone and Melt Homogeneity on Extrusion and Injection Molding Processes
- Further Considerations of Simulation of Flow in Pin Barrel Extruders and in Screw Extruders with Sliced Flights
- Deformation Fields and Residence Time Distributions in Polymer Melt Flows
- Flow History – Morphology Development in Crystallizable Polymer Melts
- Rheological Studies on Solutions of Poly-p-phenylene Terephthalamide in H2SO4
- Instability Phenomena in Film Casting Process
- Influence of Stretching and Cooling Conditions in Cast Film Extrusion of PP Films
- Melt Strength Behavior of PE and its Relation to Bubble Stability in Film Blowing**
- Dynamics of Double Bubble Tabular Film Process for Producing Biaxially oriented Nylon 6 Film
- A Finite Difference Study of Roll Design in Calendering Processing
Artikel in diesem Heft
- Contents
- Contents
- Original Contributions
- Innovative Extrusion Systems for Advanced Fiber and Film Extrusion
- Influence of Melting Zone and Melt Homogeneity on Extrusion and Injection Molding Processes
- Further Considerations of Simulation of Flow in Pin Barrel Extruders and in Screw Extruders with Sliced Flights
- Deformation Fields and Residence Time Distributions in Polymer Melt Flows
- Flow History – Morphology Development in Crystallizable Polymer Melts
- Rheological Studies on Solutions of Poly-p-phenylene Terephthalamide in H2SO4
- Instability Phenomena in Film Casting Process
- Influence of Stretching and Cooling Conditions in Cast Film Extrusion of PP Films
- Melt Strength Behavior of PE and its Relation to Bubble Stability in Film Blowing**
- Dynamics of Double Bubble Tabular Film Process for Producing Biaxially oriented Nylon 6 Film
- A Finite Difference Study of Roll Design in Calendering Processing
