Sommaire:

The dynamics of an individual flexible filaments in viscous flows is key to deciphering the rheological behavior of many complex fluids and soft materials. It also underlies a wealth of biophysical processes from flagellar propulsion to intracellular streaming. The interaction between an elongated object and a given flow depends strongly on the properties of the object - flexibility, aspect ratio and dimensions - and the flow geometry. This interaction is governed by the elasto-viscous number comparing elastic and viscous forces. During the last years, we have studied different configurations of this problem by combining microfluidics, microfabrication and microscopy. In this seminar, I will focus more on the dynamics of actin filament, used here as a model filament, in shear and pure straining flows and will describe the different morphologies the filament adopts when the elasto-viscous number increases. In shear flow, simulations matching the experimental conditions are also been performed and allow the complete phase diagram to be understood.

Pour plus d'informations, merci de contacter Truzzolillo D.