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Numerical simulation of fluid flow and heat transfer in twin‐screw extruders for non‐Newtonian materials
Author(s) -
Sastrohartono Trihono,
Jaluria Yogesh,
Karwe Mukund V.
Publication year - 1995
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760351504
Subject(s) - materials science , mechanics , mixing (physics) , heat transfer , flow (mathematics) , newtonian fluid , finite element method , non newtonian fluid , plastics extrusion , thermal , mechanical engineering , thermodynamics , composite material , engineering , physics , quantum mechanics
A new simplified approach has been proposed for the numerical simulation of the thermal transport in corotating, tangential, and self‐wiping twin‐screw extruders. It is assumed that the flow domain in a twin‐screw extruder can be divided into (i) the translation region (T‐region), which represents a flow similar to that in a single‐screw channel and (ii) the intermeshing region (I‐region), which is located between the two screws. The two regions are simulated separately and then coupled for each screw section to model the overall transport in tangential and self‐wiping twin‐screw extruders. A finite difference method is employed for the developing flow and temperature fields in the T‐region, in order to minimize the computing effort, while a finite element method is employed for determining the interchannel flow mixing and the thermal transport in the I‐region. Results are obtained in terms of temperature, velocity, and pressure variations along the screw channels and mixing between the two screws.