Rheophysics of highly concentrated coarse-particle suspensions in a wide-gap Couette rheometer.

An optical visualization apparatus has been designed to measure the particle-velocity and solid-concentration profiles of highly concentrated coarse-particle suspensions in a wide-gap Couette rheometer. The main objective is to investigate the frictional-viscous transition, a phenomenon that has been already reported in recent papers [1, 2, 3, 4], but still remains partially understood. For wide-gap viscometers and complex fluids, a related issue is the Couette problem, which underpins the rheometrical treatment for viscometric flows in coaxial-cylinder rheometers; we compare shear-rate computations obtained by solving the Couette problem (bulk estimate) and by differentiating the velocity and concentration profiles (local measurement).


Editor(s):
Nakagawa, M.
Luding, S.
Published in:
Powders and Grains 2009, 1145
Presented at:
6th International Conference on the Micro-mechanics of Granular Media, Golden, USA, 13-17 July
Year:
2009
Publisher:
Amer Inst Physics, 2 Huntington Quadrangle, Ste 1No1 D, Melville, Ny 11747-4501 Usa
Keywords:
Laboratories:




 Record created 2010-01-21, last modified 2018-03-17


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