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20 novembre 2017: 1 événement

  • Séminaires Invités

    Lundi 20 novembre 14:00-15:30 - Sebastian ALAND - TU Dresden, Germany

    Numerical Simulations of Elastic Cells and Shells in Flow

    Résumé : In this very applied talk, we consider the mechanics of biological cells and synthetic shells and their interplay with surrounding fluids.
    In the first part, we present a simple numerical model to describe cells as elastic solids surrounded by an additional cortex giving rise to surface tension, in-plane surface elasticity and bending stiffness. The model is used to simulate a single cell, immersed in a fluid flushed through a flow channel. As the cell is defomed by shear and pressure forces, the comparison of numerical and experimental cell shapes permits the extraction of cell mechanical parameters and provides a route to new medical diagnostics by cell mechanics.
    In a second part of the talk, the mathematical model will be extended to account for hollow shells. For such shells, a swimming mechanism by buckling/de-buckling has been recently proposed by researchers of the LiPhy. We present first simulations of such a microswimmer showing the intense interaction of hydrodynamics, shell elasticity and shape deformations.

    contact : Gwennou Coupier

    Lieu : LIPhy, conference room - 140 Avenue de la Physique 38402 Saint Martin d’Hères

    En savoir plus : Séminaires Invités