Viscoelastic properties of concentrated suspensions

Polyelectrolyte Effects on the Rheological Properties of Concentrated Cement Suspensions

Polyelectrolyte species, known as superplasticizers, dramatically affect the rheological properties of dense cement suspensions. We have studied the influence of sulfonated naphthalene formaldehyde condensate (SNF) and carboxylated acrylic ester (CAE) grafted copolymers of varying molecular architecture on the surface (e.g., adsorption behavior and zeta potential) and rheological properties of ...

Electrokinetic and viscoelastic properties of magnetorheological suspensions of cobalt ferrite

Magnetorheological suspensions are among the most promising colloidal systems from the point of view of their many potential technological applications. Most studies on these systems have, however, been performed using a non-polar liquid as dispersion medium. In this work we consider aqueous suspensions of synthetic, spherical cobalt ferrite particles. From electrophoretic mobility determinatio...

Viscoelastic properties of wheat gliadin and glutenin suspensions

Linear and non-linear rheological properties of wheat gliadin and glutenin suspensions were investigated at various concentrations. Linear dynamic viscoelastic properties for both gliadin and glutenin were strongly dependent on concentration. For gliadins, the storage moduli (G 0), loss moduli (G00), and phase shifts dramatically changed within a narrow concentration range, indicating that glia...

Numerical simulation of planar elongational flow of concentrated rigid particle suspensions in a viscoelastic fluid

In this paper we study, by means of numerical simulation, planar elongational flow of concentrated, inertialess, non-Brownian rigid particle suspensions in a viscoelastic fluid. The simulation is 2D and follows the approach presented in our previous work [G. D’Avino, P.L. Maffettone, M.A. Hulsen, G.W.M. Peters, A numerical method for simulating concentrated rigid particle suspensions in an elon...

Local transient rheological behavior of concentrated suspensions