ANZIAM J. 46(E) ppC320--C335, 2005.

Prediction of chain length effects in elongational flows of dilute polymer solutions by successive fine graining

P. Sunthar

J. Ravi Prakash
(received 25 October 2004, revised 8 March 2005)

Abstract

A new computational tool for predicting the rheological properties of a dilute solution of polymers in q-conditions is presented. Within this approach, the polymer is modelled as a bead spring chain with finitely extensible springs and fluctuating hydrodynamic interactions incorporated. The novelty of the method lies in obtaining predictions for a very large Kuhn step chain by extrapolating results of a series of bead-springs representations to the bead-rod limit. This provides the computational advantage of using smaller number of modes in a coarse grained description and better accuracy in the extrapolated result. The effect of chain length in the unraveling dynamics of a polymer in elongational flow is examined using this approach.

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Authors

P. Sunthar
J. Ravi Prakash
Department of Chemical Engineering, Monash University, Melbourne, Victoria 3800, Australia. mailto:Ravi.Jagadeeshan@eng.monash.edu.au

Published May 3, 2005. ISSN 1446-8735

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Copyright Austral. Mathematical Soc.; prepared May 3, 2005, from Sunt.tex with anziamje.sty (v2.3c)