TY  - JOUR
AU  - Noguchi, H.
AU  - Gompper, G.
TI  - Vesicle dynamics in shear and capillary flows
JO  - Journal of physics / Condensed matter
VL  - 17
SN  - 0953-8984
CY  - Bristol
PB  - IOP Publ.
M1  - PreJuSER-49652
SP  - s3439 - s3444
PY  - 2005
N1  - Record converted from VDB: 12.11.2012
AB  - The deformation of vesicles in flow is studied by a mesoscopic simulation technique, which combines multi-particle collision dynamics for the solvent with a dynamically triangulated surface model for the membrane. Shape transitions are investigated both in simple shear flows and in cylindrical capillary flows. We focus on reduced volumes, where the discocyte shape of fluid vesicles is stable, and the prolate shape is metastable. In simple shear flow at low membrane viscosity, the shear induces a transformation from discocyte to prolate with increasing shear rate, while at high membrane viscosity, the shear induces a transformation from prolate to discocyte, or tumbling motion accompanied by oscillations between these two morphologies. In capillary flow, at small flow velocities the symmetry axis of the discocyte is found not to be oriented perpendicular to the cylinder axis. With increasing flow velocity, a transition to a prolate shape occurs for fluid vesicles, while vesicles with shear-elastic membranes (like red blood cells) transform into a coaxial parachute-like shape.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000235394200033
DO  - DOI:10.1088/0953-8984/17/45/032
UR  - https://juser.fz-juelich.de/record/49652
ER  -