Non-Newtonian behaviour of flocculated suspensions

Non-Newtonian behaviour of flocculated suspensions

Flocculated suspensions from microstructure to macroscopic behavior

Emanuela Del Gado ETH Zürich Institut für Baustoffe (IfB), Schafmattstrasse 6 CH-8093 Zürich/Switzerland. [email protected] Gelation of Brownian and non-Brownian suspensions Modeling and numerical simulations gain significant insight into local processes and physical mechanisms underlying the interplay of gelation and flocculation in colloidal suspensions. We study local rearrangements, ...

Bubble Rise Phenomena in Non-Newtonian Crystal Suspensions

The characteristics of bubble motion in non-Newtonian liquids are still not well understood because many parameters influence the terminal rise velocity, trajectory and shape of bubbles (Frank, 2003). As the bubble motion is a complex problem, the degree of the complexity increases with bubble size (Kulkarni and Joshi, 2005). When bubble rises through liquid, the most resistance will be imposed...

Equilibrium-state Density Profiles of Centrifuged Cakes of Flocculated Suspensions

Many advanced ceramics are formed by colloidal consolidation using techniques such as sedimentation, centrifugation, or pressure filtration. In all these, the minimization of density variations of various colloidally-consolidated cakes has not been examined systematically until recently. Schilling et al.' used y-ray densitometry to study the density variations in a sedimented cake and showed th...

Rheological non-Newtonian behaviour of ethylene glycol-based Fe2O3 nanofluids

The rheological behaviour of ethylene glycol-based nanofluids containing hexagonal scalenohedral-shaped α-Fe2O3 (hematite) nanoparticles at 303.15 K and particle weight concentrations up to 25% has been carried out using a cone-plate Physica MCR rheometer. The tests performed show that the studied nanofluids present non-Newtonian shear-thinning behaviour. In addition, the viscosity at a given s...