This title appears in the Scientific Report :
2005
Please use the identifier:
http://dx.doi.org/10.1088/0953-8984/17/45/032 in citations.
Vesicle dynamics in shear and capillary flows
Vesicle dynamics in shear and capillary flows
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 capil...
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Personal Name(s): | Noguchi, H. |
---|---|
Gompper, G. | |
Contributing Institute: |
Theorie II; IFF-TH-II |
Published in: | Journal of physics / Condensed matter, 17 (2005) S. s3439 - s3444 |
Imprint: |
Bristol
IOP Publ.
2005
|
Physical Description: |
s3439 - s3444 |
DOI: |
10.1088/0953-8984/17/45/032 |
Document Type: |
Journal Article |
Research Program: |
Kondensierte Materie |
Series Title: |
Journal of Physics: Condensed Matter
17 |
Subject (ZB): | |
Publikationsportal JuSER |
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. |