Some nonlinear effects in soft matter
Marine Thiébaud, Université Joseph Fourier (Grenoble)
I am going to present my PhD Work about nonequilibrium properties of low surface tension interfaces. This analytical and numerical work is based on experimental study on colloidal fluid interfaces, made by Derks et al [1]. I will focus on the last part of my work about moderate and large shear rates. A numerical study shows similarites between Burgers phenomenology and the studied model which made the model a promising object of study. Then, I am going to introduce some results about the bidimensional rheological properties of vesicle suspension at fixed concentration, the object of my post-doc work. After a few words on the numerical method, I am going to show the relationship between vesicle organisation and apparent viscosity.
[1] Derks, Aarts, Bonn, Lekkerkerker, and Imhof, Suppression of Thermally Excited Capillary Waves by Shear Flow, Phys. Rev. Lett. 97, 038301 (2006)