Fluid Vesicles with Viscous Membranes in Shear Flow

Details Fluid Vesicles with Viscous Membranes in Shear Flow Fluid Vesicles with Viscous Membranes in Shear Flow

2004-04-15

arxiv.org/abs/cond-mat/0404356v1

Phys. Rev. Lett. 93, 258102 (2004)

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.93.258102

The effect of membrane viscosity on the dynamics of vesicles in shear flow is studied. We present a new simulation technique, which combines three-dimensional multi-particle collision dynamics for the solvent with a dynamically-triangulated membrane model. Vesicles are found to transit from steady tank-treading to unsteady tumbling motion with increasing membrane viscosity. Depending on the reduced volume and membrane viscosity, shear can induce both discocyte-to-prolate and prolate-to-discocyte transformations. This dynamical behavior can be understood from a simplified model.

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