Rheology signature of flocculated silica 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, ...

Extensional rheology of active suspensions.

A simple model is presented for the effective extensional rheology of a dilute suspension of active particles, such as self-propelled microswimmers, extending previous classical studies on suspensions of passive rodlike particles. Neglecting particle-particle hydrodynamic interactions, we characterize the configuration of the suspension by an orientation distribution, which satisfies a Fokker-P...

The rheology of fibre suspensions

We review theoretical work on the rheology of fibre suspensions. We seek to clarify one or two confusions in published work and also give a small improvement to Batchelor’s formula for extensional viscosity of suspensions of long fibres between the dilute and semi-dilute régimes.

Rheology of active-particle suspensions.

We study the interplay of activity, order, and flow through a set of coarse-grained equations governing the hydrodynamic velocity, concentration, and stress fields in a suspension of active, energy-dissipating particles. We make several predictions for the rheology of such systems, which can be tested on bacterial suspensions, cell extracts with motors and filaments, or artificial machines in a...