Laureats

• Sujet encadré par Joel MARTHELOT (IUSTI), Cédric BELLIS & Stéphane BOURGEOIS (LMA)

Elastic sheets with mesoscale architecture obtained by folding or cutting have recently drawn considerable interest in the mechanics and engineering community. The cuts and features can be tailored to allow the sheets to morph into complex three dimensional shapes with unusual mechanical characteristics such as auxeticity, deployability and programmable non-linear properties.The main objective of the project is twofold: to identify and build a fundamental understanding of the ​mechanical response of hyperelastic membranes with architected cut patterns on the one hand and to transfer the resulting tunable mechanisms to prototypes for more reliable compliant medical devices​ on the other hand (…)

This study aims to propose the description of possible mechanisms induced by the interaction of a shock wave impinging a cell membrane. More precisely, we attempt to estimate the shear stress on the membrane assuming that the Richtmyer-Meshkov instability drives a vorticity generation at the cell interface. Thus, we develop an original experimental approach based on highspeed microscopy phase contrast to characterize the interaction of shock wave induced by laser breakdown on vesicles or biological cells using.

Crystallization is one of the main processes used in industry to produce, purify or separate solid compounds or products. The research project is to develop a continuous crystallization process allowing to produce a compound or a product With fixed properties by membrane contactor. The objective of the specific IMI project also includes the development of a technique to characterize the created crystals by X-ray microtomography and 3D image analyze.

This project addreses the transport and mixing of fluid and inertial particules in a Taylor-Couette cell with permeable cylinders. Analytical expressions for the velocity and pressure fields of laminar and vortical flows have been previously obtained in this configuration and we aim at using them to compute the advection of particules in order to get new insight into their inhomogeneous and unsteady transport. To do so, some open questions such as the forces acting on a particule in the vicinity of a permeable wall must be addressed.

Developing experimental technique to measure the microstructure of opaque concentrated suspensions of particles is essential to progress in the understanding of their rheology. The objectives of our project are (1) to develop a novel ultrasound tool to measure the microstructure of concentrated suspensions, and (2) establish the rheology-microstructure relationship in suspensions of red blood cells by using this ultrasound tool and dedicated numerical simulations.