Séminaire PMMH - Kirsten Martens (LIPhy, Univ. Grenoble Alpes)

  Version imprimable de cet article RSS
6 octobre 11:00 » 12:30 — A1 (Urbain)

Fluidization of yield stress materials through active and activated local events

In this talk I will discuss the possible fluidization mecanisms of yield stress materials through either locally active dynamics, like cell division in tissues [1,2] or vibration induced local plasticity like in externally driven granular materials [3]. The long range elastic response to these events lead to a non-trivial fluidization of the material, that can be captured in particle-based simulations and rationalized by using mesoscopic descriptions. This allows to understand the underlying dynamics and to reproduce the resulting non-linear rheological behaviours.

PNG - 582.4 ko

[1] D. A. Matoz-Fernandez, E. Agoritsas, J.-L. Barrat, E. Bertin and K. Martens, Nonlinear Rheology in a Model Biological Tissue, PRL, 118, 158105 (2017).
[2] D. A. Matoz-Fernandez, K. Martens, R. Sknepnek, J.-L. Barrat and S. Henkes, Cell Division and Death Inhibit Glassy Behaviour of Confluent Tissues, Soft matter, 13, 3205 (2017).
[3] M. Le Goff, V. Vasisht and K. Martens, Vibration Induced Fluidization of Yield Stress Materials, to be submitted soon.





ÉCOLE SUPÉRIEURE DE PHYSIQUE ET DE CHIMIE INDUSTRIELLES DE LA VILLE DE PARIS
10 Rue Vauquelin, 75005 Paris