TY  - JOUR
AU  - Ripoll, M.
AU  - Winkler, R. G.
AU  - Gompper, G.
TI  - Hydrodynamic screening of star polymers in shear flow
JO  - The European physical journal / E
VL  - 23
SN  - 1292-8941
CY  - Berlin
PB  - Springer
M1  - PreJuSER-58131
SP  - 349 - 354
PY  - 2007
N1  - Record converted from VDB: 12.11.2012
AB  - 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.
KW  - Computer Simulation
KW  - Diffusion
KW  - Elasticity
KW  - Microfluidics
KW  - Molecular Conformation
KW  - Movement
KW  - Physics: methods
KW  - Polymers: chemistry
KW  - Shear Strength
KW  - Software
KW  - Solvents: chemistry
KW  - Stress, Mechanical
KW  - Viscosity
KW  - Polymers (NLM Chemicals)
KW  - Solvents (NLM Chemicals)
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
C6  - pmid:17712520
UR  - <Go to ISI:>//WOS:000249461500002
DO  - DOI:10.1140/epje/i2006-10220-0
UR  - https://juser.fz-juelich.de/record/58131
ER  -