The rheological properties of capillary suspensions, suspensions with small amounts of an added immiscible fluid, are dramatically altered with the addition of the secondary fluid. We investigate a capillary suspension to determine how the network ages and restructures at rest and under applied external shear deformation. The present work uses calcium carbonate suspended in silicone oil (11 % s...

A population balance model is formulated for transport of stable particulate suspensions in porous media. Equations for particle and pore size distributions were derived from the stochastic Master equation. The model accounts for particle flow reduction due to restriction for large particles to move through small pores. An analytical solution for low particle concentration is obtained for gener...

Often experimentalists study particulate samples that are nominally monodisperse. In reality, many samples have a polydispersity of 4-10%. At the level of an individual particle, the consequences of this polydispersity are unknown as it is difficult to measure an individual particle size from images of a dense sample. Here we propose a method to estimate individual particle radii from three-dim...

1. Suspensions of manganese dioxide given intravenously to the cat are virtually eliminated from the body in 1 week (168 hours). 2. As this process of removal goes on, there is a transfer of manganese from lungs to liver. 3. Similar suspensions of manganese dioxide given intravenously to rabbits are excreted more rapidly, owing to the fact that in these animals the lungs are not involved and th...

In an earlier investigation it was shown that enzymatic oxidation of octanoate occurred in saline suspensions of washed particulate matter separated from saline homogenates of rat liver by centrifugation, when these were supplemented with adenosine triphosphate and Mg++.l These preparations also catalyze the reactions of the Krebs tricarboxylic acid cycle. Further study of the properties of the...

Significant shear localization, observed as substantial concentration gradients, is discovered in large amplitude oscillatory (LAOS) simulations of a complex fluid planar Couette setup. The localization demonstrated to occur due the inertial effects imposed by LAOS, which serve perturbations nonlinear equations describing structural response shear. Additionally, criterion for onset this present...

We have studied the effects of adding participate supplements to populations of Tetrahymena pyriformis in 2 % sterile-filtered proteose peptone broth which supports cell multiplication poorly (generation times in excess of 40 h). The tested compounds were: heat-sterilized suspensions of egg albumin, nutritionally inert particles of polystyrene, sulphopropyl and quarternary amino-ethyl substitut...