Foam rheology near the jamming transition

Leiden Repository

Foam rheology near the jamming transition

Title: Foam rheology near the jamming transition
Author: Woldhuis, Erik
Publisher: Lorentz Center, Faculty of Science, Leiden University
Issue Date: 2013-12-11
Keywords: Jamming
Critical scaling
Abstract: When soft, repulsive particles, like foam bubbles or emulsion droplets, are sheared, they show interesting scaling behaviour. We develop a simple scaling model that captures the rheological behavior starting from three assumptions that explicitly depend on the microscopic interactions. This model starts from three ingredients: energy conservation, the concept of an effective steady state strain in our flowing system and a constitutive elasticity equation linking the effective strain to the shear stress. Our model allows for non-linear microscopic particle interactions and it predicts that the global rheological behaviour depends on the details of the microscopic interactions between the particles - in contrast to standard critical scaling theory. We test our model in computer simulations of soft, massless particles under steady shear and find that the numerics are broadly consistent with our model. jamming, rheology, foam, critical scaling
Description: Promotor: M.L. van Hecke, Co-Promotor: B.P. Tighe
With Summary in Dutch
Faculty: Faculteit der Wiskunde en Natuurwetenschappen
Citation: Woldhuis, E., 2013, Doctoral Thesis, Leiden University
Series/Report no.: Casimir PhD Series;2013-33
ISBN: 9789085931737

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