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The dynamics and rheology of a vesicle confined in a channel under shear floware studied at finite temperature. The effect of finite temperature on vesiclemotion and system viscosity is investigated. A two-dimensional numerical model,which includes thermal fluctuations and is based on a combination of moleculardynamics and mesoscopic hydrodynamics, is used to perform a detailed analysisin a wide range of the Peclet numbers (the ratio of the shear rate to therotational diffusion coefficient). The suspension viscosity is found to be amonotonous increasing function of the viscosity contrast (the ratio of theviscosity of the encapsulated fluid to that of the surrounding fluid) both inthe tank-treading and the tumbling regime due to the interplay of differenttemperature-depending mechanisms. Thermal effects induce shape and inclinationfluctuations of the vesicle which experiences also Brownian diffusion acrossthe channel increasing the viscosity. These effects reduces when increasing thePeclet number.

Numerical study of a confined vesicle in shear flow at finite temperature