1206.2194 (David Abreu et al.)
David Abreu, Udo Seifert
We add consistently thermal noise to reduced models of undeformable vesicles and capsules in shear flow and derive analytically the corresponding stochastic equations of motion. We calculate the steady-state probability distribution function and construct the corresponding phase diagrams for the different dynamical regimes. For fluid vesicles, we predict that at small shear rates thermal fluctuations induce a tumbling motion for any viscosity contrast. For elastic capsules, due to thermal mixing an intermittent regime appears in regions where deterministic models predict only pure tank-treading or tumbling.
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http://arxiv.org/abs/1206.2194
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