%0 Journal Article
%A Ripoll, M.
%A Winkler, R. G.
%A Gompper, G.
%T Hydrodynamic screening of star polymers in shear flow
%J The European physical journal / E
%V 23
%@ 1292-8941
%C Berlin
%I Springer
%M PreJuSER-58131
%P 349 - 354
%D 2007
%Z Record converted from VDB: 12.11.2012
%X 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.
%K Computer Simulation
%K Diffusion
%K Elasticity
%K Microfluidics
%K Molecular Conformation
%K Movement
%K Physics: methods
%K Polymers: chemistry
%K Shear Strength
%K Software
%K Solvents: chemistry
%K Stress, Mechanical
%K Viscosity
%K Polymers (NLM Chemicals)
%K Solvents (NLM Chemicals)
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%$ pmid:17712520
%U <Go to ISI:>//WOS:000249461500002
%R 10.1140/epje/i2006-10220-0
%U https://juser.fz-juelich.de/record/58131