arXiv subjects

Vasiliy Kantsler

Publications and source records attributed to Vasiliy Kantsler.

2 recordsLinked to original sources

arXiv2011

Dynamics of Vesicles in shear and rotational flows: Modal Dynamics and Phase Diagram

Despite the recent upsurge of theoretical reduced models for vesicle shape dynamics, comparisons with experiments have not been accomplished. We review the implications of some of the recently proposed models for vesicle dynamics, especially the Tumbling-Trembling domain regions of the phase plane and show that they all fail to capture the essential behavior of real vesicles for excess areas, Δ, greater than 0.4. We emphasize new observations of shape harmonics and the role of thermal fluctuations.

cond-mat.soft↗

arXiv2007

Vesicle dynamics in elongation flow: Wrinkling instability and bud formation

We present experimental results on the relaxation dynamics of vesicles subjected to a time-dependent elongation flow. We observed and characterized a new instability, which results in the formation of higher order modes of the vesicle shape (wrinkles), after a switch in the direction of the gradient of the velocity. This surprising generation of membrane wrinkles can be explained by the appearance of a negative surface tension during the vesicle deflation, due to compression in a sign-switching transient. Moreover, the formation of buds in the vesicle membrane has been observed in the vicinity of the dynamical transition point.

cond-mat.soft↗