%0 Journal Article
%A Chelakkot, R.
%A Winkler, R.G.
%A Gompper, G.
%T Semiflexible polymer conformation, distribution and migration in microcapillary flows
%J Journal of physics / Condensed matter
%V 23
%@ 0953-8984
%C Bristol
%I IOP Publ.
%M PreJuSER-15476
%P 184117
%D 2011
%Z The financial support and the stimulating environment of the DFG priority program 'Nano- and Microfluidics' is gratefully acknowledged. In particular, we thank R Finken and U Seifert (Stuttgart), L Schmid and T Franke (Augsburg), and D Steinhauser and T Pfohl (Gottingen and Basel) for many helpful and inspiring discussions.
%X The flow behavior of a semiflexible polymer in microchannels is studied using multiparticle collision dynamics, a particle-based hydrodynamic simulation technique. Conformations, distributions, and radial cross-streamline migration are investigated for various bending rigidities, with persistence lengths L(p) in the range 0.5 ≤ L(p)/L(r) ≤ 30. The flow behavior is governed by the competition between a hydrodynamic lift force and steric repulsion from the wall, which lead to migration away from the wall, and a locally varying flow induced orientation, which drives the polymer away from the channel center and towards the wall. The different dependences of these effects on the polymer bending rigidity and the flow velocity results in a complex dynamical behavior. However, a generic effect is the appearance of a maximum in the monomer and the center-of-mass distributions, which occurs at the channel center for small flow velocities, but moves off-center at higher velocities.
%K Algorithms
%K Animals
%K Biophysics: methods
%K Computer Simulation
%K Diffusion
%K Erythrocytes: cytology
%K Humans
%K Hydrodynamics
%K Models, Chemical
%K Molecular Conformation
%K Motion
%K Nanotechnology: methods
%K Polymers: chemistry
%K Solvents: chemistry
%K Polymers (NLM Chemicals)
%K Solvents (NLM Chemicals)
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%$ pmid:21508477
%U <Go to ISI:>//WOS:000289725300018
%R 10.1088/0953-8984/23/18/184117
%U https://juser.fz-juelich.de/record/15476