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Monday, April 28, 2008
11:00 AM - 12:00 PM
CNLS Conference Room (TA-3, Bldg 1690)


Quasi-spherical vesicles in external flows

Konstantin Turitsyn
University of Chicago

Vesicles, immersed in external flows exhibit a variety of different dynamical behaviors, which include tank-treading, tumbling and trembling motions. Theory describing the dynamics of quasi-spherical vesicles is presented, which explains most of the experimental observations. Resulting phase diagram, separating different regimes is shown to be in good agreement with experiments. It is shown that the vesicle experiences a critical slowdown in the vicinity of the transition lines. New type of motion called spinning is predicted which can be observed for strong enough flows. The effect of vesicle membrane wrinkling, observed in recent experiments by Kantsler and Steinberg is explained in the framework of the same theory.

Host: Misha Chertkov, T-13