This title appears in the Scientific Report :
2010
Please use the identifier:
http://hdl.handle.net/2128/22975 in citations.
Please use the identifier: http://dx.doi.org/10.1209/0295-5075/89/28002 in citations.
Dynamics of fluid vesicles in flow through structured microchannels
Dynamics of fluid vesicles in flow through structured microchannels
The dynamics of fluid vesicles is studied under flow in microchannels, in which the width varies periodically along the channel. Three types of flow instabilities of prolate vesicles are found. For small quasi-spherical vesicles-compared to the average channel width perturbation theory predicts a tr...
| Personal Name(s): | Noguchi, H. |
|---|---|
| Gompper, G. / Schmid, L. / Wixforth, A. / Franke, T. | |
| Contributing Institute: |
Theorie der Weichen Materie und Biophysik; IFF-2 JARA - HPC; JARA-HPC Theorie der Weichen Materie und Biophysik; IAS-2 |
| Published in: | epl, 89 (2010) S. 28002 |
| Imprint: |
Les Ulis
EDP Sciences
2010
|
| Physical Description: |
28002 |
| DOI: |
10.1209/0295-5075/89/28002 |
| Document Type: |
Journal Article |
| Research Program: |
BioSoft: Makromolekulare Systeme und biologische Informationsverarbeitung |
| Series Title: |
Europhysics Letters
89 |
| Subject (ZB): | |
| Link: |
OpenAccess OpenAccess |
| Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1209/0295-5075/89/28002 in citations.
|
The dynamics of fluid vesicles is studied under flow in microchannels, in which the width varies periodically along the channel. Three types of flow instabilities of prolate vesicles are found. For small quasi-spherical vesicles-compared to the average channel width perturbation theory predicts a transition from a state with orientational oscillations of a fixed prolate shape to a state with shape oscillations of symmetrical ellipsoidal or bullet-like shapes with increasing. flow velocity. Experimentally, such orientational oscillations are observed during the slow migration of a vesicle towards the centerline of the channel. For larger vesicles, mesoscale hydrodynamics simulations and experiments show similar symmetric shape oscillation at reduced volumes V* greater than or similar to 0.9. However, for non-spherical vesicles with V* less than or similar to 0.9, shapes are found with two symmetric or a single asymmetric tail. Copyright (C) EPLA, 2010 |