The origin of the strain-rate discontinuity in 2D foam rheometry with circular geometry

2009/07/09 by Weaire, Denis, Clancy, Robert J., Hutzler, Stefan
#FOS: Physical sciences #Soft Condensed Matter (cond-mat.soft)

paper · doi:10.48550/arxiv.0907.1624

Abstract

The observed discontinuity in strain-rate for a two-dimensional foam undergoing shear in a (circular) Couette system is explained in terms of the continuum (Herschel-Bulkley) model. It is attributed to the finite difference between yield and limit stress.

Related

• Foam in a two-dimensional Couette shear: a local measurement of bubble deformation
• Discrete rearranging disordered patterns, part II: 2D plasticity, elasticity and flow of a foam
• A texture tensor to quantify deformations: the example of two-dimensional flowing foams
• Relaxation and flow in linearly sheared two-dimensional foams
• Rheology of nearly ideal 3d foams