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Accueil du site > Séminaires > Archives séminaires > Séminaires 2013 > Séminaire MSC. Lundi 25 Novembre 2013 à 14h30. Peter Sollich (King’s College, London) : Unified study of glass and jamming rheology in amorphous soft particle systems.

Séminaire MSC. Lundi 25 Novembre 2013 à 14h30. Peter Sollich (King’s College, London) : Unified study of glass and jamming rheology in amorphous soft particle systems

Sauf mention contraire, les séminaires et les soutenances se déroulent à 11h30 en salle 454A du bâtiment Condorcet.


Unified study of glass and jamming rheology in amorphous soft particle systems

Atsushi Ikeda, Ludovic Berthier, and Peter Sollich

Peter Sollich, Department of Mathematics, King’s College London

Attention, horaire inhabituel, lundi 25 Novembre à 14h30.

We explore numerically the shear rheology of soft repulsive particles at large volume fraction. The interplay between viscous dissipation and thermal motion results in multiple rheological regimes encompassing Newtonian, shear-thinning and yield stress regimes near the ‘colloidal’ glass transition when thermal fluctuations are important, crossing over to qualitatively similar regimes near the ‘jamming’ transition when dissipation dominates. In the crossover regime, glass and jamming sectors coexist and give complex flow curves. Although glass and jamming limits are characterized by similar macroscopic flow curves, we show that they occur over distinct time and stress scales and correspond to distinct microscopic dynamics. We propose a simple rheological model describing the glass to jamming crossover in the flow curves, and discuss the experimental implications of our results.


Contact : Équipe séminaires / Seminar team - Published on / Publié le 17 octobre 2013


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