ABSTRACT
The slurry is prepared inside a Couette cell, with a large excess of oil. Because the particles are heavier than the fluid and undergo about no Brownian motion, they accumulate to form a sedimentary bed. In “monodispersed” samples, which only contain “large” particles, the average solid volume fraction inside the bed, , is about 59% . “Bidispersed” samples contain both “large” and “small” particles, in (84, 16)% proportions, respectively. In this case compacity is larger, with up to 67%. When a large shear is applied, is slightly decreased because of the shear-induced dilatancy effect (see paragraph 3.3 below).
