The European Physical Journal E

, Volume 23, Issue 4, pp 349–354

Hydrodynamic screening of star polymers in shear flow

Regular Article

DOI: 10.1140/epje/i2006-10220-0

Cite this article as:
Ripoll, M., Winkler, R.G. & Gompper, G. Eur. Phys. J. E (2007) 23: 349. doi:10.1140/epje/i2006-10220-0


The mutual effects of the conformations of a star polymer in simple shear flow and the deformation of the solvent flow field are investigated by a hybrid mesoscale simulation technique. We characterize the flow field near the star polymer as a function of its functionality (arm number) f . A strong screening of the imposed flow is found inside the star polymer, which increases with increasing f . To elucidate the importance of hydrodynamic screening, we compare results for hydrodynamic and random solvents. The dependence of the polymer orientation angle on the Weissenberg number shows a power law behavior with super-universal exponent --independent of hydrodynamic and excluded-volume interactions. In contrast, the polymer rotation frequency changes qualitatively when hydrodynamic interactions are switched on.


82.20.Wt Computational modelling; simulation83.50.-v Deformation and flow66.20.+d Viscosity of liquids; diffusive momentum transport

Copyright information

© EDP Sciences, Società Italiana di Fisica and Springer-Verlag 2007

Authors and Affiliations

  1. 1.Institut für FestkörperforschungForschungszentrum JülichJülichGermany