Author(s)

B.A. Davis, W.F. Florez & T.A. Osswald

Abstract

Investigation of non-linear flows in polymer mixing B.A. Davis, W.F. Florez, T.A. Osswald Polymer Processing Research Group, Department of Mechanical Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA ABSTRACT Two alternatives for the solution of non-linear problems using boundary integrals are presented. First the dual reciprocity method is presented for both flow and heat transfer problems in polymer processing. The technique proved to work well for heat trasfer but only marginally for non-linear flow problems. The second form of dealing with non-linearities is a cell integration method. This technique was successfully applied to polymer flow problems which included the shear thinning effect, the most important non-linearity in this type of problems. INTRODUCTION Numerical simulation of polymer mixing is complicated by the spectrum of flow behavior exhibited by polymer melts. The molecular structure of polymers is the underlying reason for the non

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