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Licensed Unlicensed Requires Authentication Published by De Gruyter June 23, 2016

Study of Dispersive and Distributive Mixing in a Converging Pipe

M. Mostafaiyan, S. Wiessner and G. Heinrich


The creeping flow of a polymeric melt in a converging pipe is analyzed using an in-house finite element code. An introduced power-law model considers the shear thinning behavior of the viscous liquid. Furthermore, distributive and dispersive mixing processes are evaluated with the mean strain function and the Manas-Zloczower mixing index, respectively. Using a parametric study, the dependency of the mixing criteria on the rheological and geometrical factors is investigated. Finally, a new analytical expression for the evaluation of the distributive mixing is suggested, based on simplifying assumptions and a curve fitting method.

*Correspondence address, Mail address: Mehdi Mostafaiyan, Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Straße 6, D-01069 Dresden, Germany. E-mail: ,


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Received: 2015-10-01
Accepted: 2016-02-06
Published Online: 2016-06-23
Published in Print: 2016-07-30

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