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@ARTICLE{Messlinger:5079,
      author       = {Messlinger, S. and Schmidt, B. and Noguchi, H. and Gompper,
                      G.},
      title        = {{D}ynamical regimes and hydrodynamic lift of viscous
                      vesicles under shear},
      journal      = {Physical review / E},
      volume       = {80},
      number       = {1},
      issn         = {1539-3755},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {PreJuSER-5079},
      pages        = {011901},
      year         = {2009},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {The dynamics of two-dimensional viscous vesicles in shear
                      flow, with different fluid viscosities eta(in) in and
                      eta(out) inside and outside, respectively, is studied using
                      mesoscale simulation techniques. Besides the well-known
                      tank-treading and tumbling motions, an oscillatory swinging
                      motion is observed in the simulations for large shear rate.
                      The existence of this swinging motion requires the
                      excitation of higher-order undulation modes (beyond
                      elliptical deformations) in two dimensions. Keller-Skalak
                      theory is extended to deformable two-dimensional vesicles,
                      such that a dynamical phase diagram can be predicted for the
                      reduced shear rate and the viscosity contrast
                      eta(in)/eta(out). The simulation results are found to be in
                      good agreement with the theoretical predictions, when
                      thermal fluctuations are incorporated in the theory.
                      Moreover, the hydrodynamic lift force, acting on vesicles
                      under shear close to a wall, is determined from simulations
                      for various viscosity contrasts. For comparison, the lift
                      force is calculated numerically in the absence of thermal
                      fluctuations using the boundary-integral method for equal
                      inside and outside viscosities. Both methods show that the
                      dependence of the lift force on the distance y(cm) of the
                      vesicle center of mass from the wall is well described by an
                      effective power law y(cm)(-2) for intermediate distances
                      0.8R(p) less than or similar to y(cm) less than or similar
                      to 3R(p) with vesicle radius R-p. The boundary-integral
                      calculation indicates that the lift force decays
                      asymptotically as 1/[y(cm) 1n(y(cm))] far from the wall.},
      keywords     = {J (WoSType)},
      cin          = {IFF-2 / IAS-2 / JARA-HPC},
      ddc          = {530},
      cid          = {I:(DE-Juel1)VDB782 / I:(DE-Juel1)IAS-2-20090406 /
                      $I:(DE-82)080012_20140620$},
      pnm          = {Kondensierte Materie},
      pid          = {G:(DE-Juel1)FUEK414},
      shelfmark    = {Physics, Fluids $\&$ Plasmas / Physics, Mathematical},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000268616300089},
      doi          = {10.1103/PhysRevE.80.011901},
      url          = {https://juser.fz-juelich.de/record/5079},
}