TY  - JOUR
AU  - Noguchi, H.
AU  - Gompper, G.
TI  - Dynamics of Fluid Vesicles in Shear Flow: Effect of Membrane Viscosity and Thermal Fluctuations
JO  - Physical review / E
VL  - 72
IS  - 1
SN  - 1539-3755
CY  - College Park, Md.
PB  - APS
M1  - PreJuSER-47062
SP  - 011901
PY  - 2005
N1  - Record converted from VDB: 12.11.2012
AB  - The dynamical behavior of vesicles is investigated in simple shear flow. A simulation technique is presented that combines a three-dimensional particle-based mesoscopic model (multiparticle collision dynamics) for the solvent with a dynamically triangulated surface model for the membrane. In this model, thermal fluctuations of the solvent and of the membrane are consistently taken into account. The membrane viscosity can be varied by changing the bond-flip rate of the dynamically triangulated surface. Vesicles are found to transit from steady tank-treading to unsteady tumbling motion with increasing membrane viscosity. At small reduced volumes, the shear induces a transformation from a discocyte to a prolate shape at low membrane viscosity. On the other hand, at high membrane viscosity, the shear induces a transformation from prolate to discocyte, or tumbling motion accompanied by shape oscillations between these two states. Thermal fluctuations induce intermittent tumbling and smooth out the transitions. This effect can be understood from a simplified stochastic model.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000230886900072
DO  - DOI:10.1103/PhysRevE.72.011901
UR  - https://juser.fz-juelich.de/record/47062
ER  -