The candidate will study the flows in the thin liquid films separating bubbles, generated by the deformation of a structure made of a few bubbles. A specific set-up has just been designed to reproduce at the local scale the deformations occurring in films in a 3D sample: compression, dilatation or shear. The candidate will use and improve an innovative optical technique based on the use of fluorescent surfactants (with the help of an engineer in optic) which we developed to measure such velocity fields. The results obtained will be implemented to predict the rheological properties of 3D foams under steady or oscillatory shear. Langmuir trough experiments and rheometry on 3D foam will allow to built a multi scale model for foam viscosity.

Publié le 12/05/2019