Three-dimensional jamming and flows of soft glassy materials

Details Three-dimensional jamming and flows of soft glassy materials Three-dimensional jamming and flows of soft glassy materials

2009-10-09

arxiv.org/abs/0910.1821v2

Nature Materials 9 (2010) 115 - 119

Physics

Condensed Matter

Soft Condensed Matter

http://www.nature.com/nmat/journal/v9/n2/abs/nmat2615.html

Scientific paper

10.1038/nmat2615

Various disordered dense systems such as foams, gels, emulsions and colloidal suspensions, exhibit a jamming transition from a liquid state (they flow) to a solid state below a yield stress. Their structure, thoroughly studied with powerful means of 3D characterization, exhibits some analogy with that of glasses which led to call them soft glassy materials. However, despite its importance for geophysical and industrial applications, their rheological behavior, and its microscopic origin, is still poorly known, in particular because of its nonlinear nature. Here we show from two original experiments that a simple 3D continuum description of the behaviour of soft glassy materials can be built. We first show that when a flow is imposed in some direction there is no yield resistance to a secondary flow: these systems are always unjammed simultaneously in all directions of space. The 3D jamming criterion appears to be the plasticity criterion encountered in most solids. We also find that they behave as simple liquids in the direction orthogonal to that of the main flow; their viscosity is inversely proportional to the main flow shear rate, as a signature of shear-induced structural relaxation, in close similarity with the structural relaxations driven by temperature and density in other glassy systems.

Affiliated with

Also associated with

No associations

Rating

Three-dimensional jamming and flows of soft glassy materials does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Three-dimensional jamming and flows of soft glassy materials, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Three-dimensional jamming and flows of soft glassy materials will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-52047