Solid-fluid transition in a granular shear flow

Details Solid-fluid transition in a granular shear flow Solid-fluid transition in a granular shear flow

2004-02-25

arxiv.org/abs/cond-mat/0402618v1

Phys. Rev. Lett., 93, 068001 (2004)

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 4 figures, submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.93.068001

The rheology of a granular shear flow is studied in a quasi-2d rotating cylinder. Measurements are carried out near the midpoint along the length of the surface flowing layer where the flow is steady and non-accelerating. Streakline photography and image analysis are used to obtain particle velocities and positions. Different particle sizes and rotational speeds are considered. We find a sharp transition in the apparent viscosity ($\eta$) variation with rms velocity ($u$). In the fluid-like region above the depth corresponding to the transition point (higher rms velocities) there is a rapid increase in viscosity with decreasing rms velocity. Below the transition depth we find $\eta \propto u^{-1.5}$ for all the different cases studied and the material approaches an amorphous solid-like state deep in the layer. The velocity distribution is Maxwellian above the transition point and a Poisson velocity distribution is obtained deep in the layer. The observed transition appears to be analogous to a glass transition.

Affiliated with

Also associated with

No associations

Rating

Solid-fluid transition in a granular shear flow 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 Solid-fluid transition in a granular shear flow, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Solid-fluid transition in a granular shear flow will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-484632