A. Lawal et Dm. Kalyon, SIMULATION OF INTENSITY OF SEGREGATION DISTRIBUTIONS USING 3-DIMENSIONAL FEM ANALYSIS - APPLICATION TO COROTATING TWIN-SCREW EXTRUSION PROCESSING, Journal of applied polymer science, 58(9), 1995, pp. 1501-1507
The corotating twin screw extrusion flow is simulated to generate the
distributions of intensity of segregation and integral measures of mix
ing and forwarding. The simulation focused on the lenticular kneading
disk elements that necessitated the application of a three-dimensional
finite element method to solve the conservation equations. The intens
ity of segregation distributions were determined by introducing a trac
er blob numerically and tracking the concentration of the tracer parti
cles as a function of location and time. In spite of the chaotic natur
e of the dynamics of this flow, the analyses provided the broad featur
es of twin extrusion flow and its ability to mix. The processing chara
cteristics of kneading disks were found to depend on the stagger angle
and complemented earlier numerical and experimental results on reside
nce time distributions and color incorporated tracer analyses. (C) 199
5 John Wiley & Sons, Inc.