Shear banding and the solid/liquid transition in yield stress fluids

An increase of the particle volume fraction φ plays here two contradictory roles: it hinders settling, which is accounted for by the same hindrance function f (φ) as in Newto-

Figure 5: Typical flow curve obtained for some pasty materials under imposed, apparent shear rate: the solid line corresponds to the rheological behavior of the material

increase of both the plastic and the elastic deformation components with the square of the shear stress, reveal the fundamental characteristics of a simple generic model

Pour cette première exposition personnelle à Genève, l’artiste, qui vit entre Cotonou et Hambourg, a choisi la Maison Tavel et les archives des Nations Unies pour mener une

These different characteristics are typical of the Saffman-Taylor instability [32] for simple [33] or yield stress fluids [34] which occurs when a viscous fluid is pushed by a

Striking differences with the case of static aqueous foams have been observed, namely the independence of the velocity on the bubble size and the unexpected arrest of drainage at high

The global characteristics of dip-coating with yield stress fluids do not differ from dip-coating with simple liquids: the bath essentially remains macroscopically at rest

results on sheared attractive particles showing transient shear banding [27] and earlier observations of ultraslow transients in concentrated emulsions [28], the present