Local residence time distributions in an intermeshing corotating twin screw extruder
Résumé
This paper deals with the local residence time distributions (RTD) in an intermeshing corotating twin screw extruder and shows their interest.
The RTDs were measured in three zones of the extruder and tracer was injected at different locations. Optical fiber probes are used in order to obtain real-time measurements of fluorescence radiation during extrusion of polyethylene HDPE and fluorescent particles of anthracene.
First, experiments were carried out to measure local residence time distributions in different processing conditions and to determine the quality of mixing thanks to the specific throughput.
Then, the convolution theory was verified by comparing the convolution of local RTDs functions to the overall RTD.
Finally, a predictive RTD model for twin screw elements based on the flow analysis of the individual screw zones and their statistical superpositions was developed.
Origine : Fichiers produits par l'(les) auteur(s)
Licence : Domaine public
Licence : Domaine public