Three-dimensional imaging of colloidal glasses under steady shear

Details Three-dimensional imaging of colloidal glasses under steady shear Three-dimensional imaging of colloidal glasses under steady shear

2006-05-09

arxiv.org/abs/cond-mat/0605247v4

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 5 figures, to be published in PRL

Scientific paper

10.1103/PhysRevLett.99.028301

Using fast confocal microscopy we image the three-dimensional dynamics of particles in a yielded hard-sphere colloidal glass under steady shear. The structural relaxation, observed in regions with uniform shear, is nearly isotropic but is distinctly different from that of quiescent metastable colloidal fluids. The inverse relaxation time $\tau_\alpha^{-1}$ and diffusion constant $D$, as functions of the {\it local} shear rate $\dot{\gamma}$, show marked shear thinning with $\tau_\alpha^{-1} \propto D \propto \dot{\gamma}^{0.8}$ over more than two decades in $\dot{\gamma}$. In contrast, the {\it global} rheology of the system displays Herschel-Bulkley behavior. We discuss the possible role of large scale shear localization and other mechanisms in generating this difference.

Affiliated with

Also associated with

No associations

Rating

Three-dimensional imaging of colloidal glasses under steady shear 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 imaging of colloidal glasses under steady shear, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Three-dimensional imaging of colloidal glasses under steady shear will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-705661