The viscosity of colloidal suspensions varies with shear rate, an important effect encountered in many natural and industrial processes. Although this non-Newtonian behavior is believed to arise from the arrangement of suspended particles and their mutual interactions, microscopic particle dynamics are difficult to measure. By combining fast confocal microscopy with simultaneous force measurements, we systematically investigate a suspension's structure as it transitions through regimes of different flow signatures. Our measurements of the microscopic single-particle dynamics show that shear thinning results from the decreased relative contribution of entropic forces and that shear thickening arises from particle clustering induced by hydrod...
Dense suspensions can exhibit an abrupt change in their viscosity in response to increasing shear ra...
Dense suspensions can exhibit an abrupt change in their viscosity in response to increasing shear ra...
We review the sequences of structural states that can be induced in colloidal suspensions by the app...
My thesis work focuses on the nonlinear mechanical behaviors of colloidal suspensions at the particl...
Colloidal suspensions exhibit shear thinning and shear thickening. The most common interpretation of...
241 pagesColloidal suspensions consisting of solid particles in a fluid are ubiquitous in industry a...
International audienceWe study the flow of suspensions of non-Brownian particles dispersed into a Ne...
International audienceWe study the flow of suspensions of non-Brownian particles dispersed into a Ne...
We investigate the effect of shear flow on the microstructure of colloidal suspensions by means of m...
Shear thickening is a phenomenon in which the viscosity of a suspension increases with increasing st...
Shear thickening, which corresponds to an increase of viscosity with shear rate, is ubiquitously obs...
International audienceThe process by which sheared suspensions go through a dramatic change in visco...
Shear thickening, which corresponds to an increase of viscosity with shear rate, is ubiquitously obs...
This paper focuses on shear-thinning in non-Brownian suspensions. In particular, it proposes a quant...
Restricted sliding or rotational motion of colloidal particles plays a key role in the emergence of ...
Dense suspensions can exhibit an abrupt change in their viscosity in response to increasing shear ra...
Dense suspensions can exhibit an abrupt change in their viscosity in response to increasing shear ra...
We review the sequences of structural states that can be induced in colloidal suspensions by the app...
My thesis work focuses on the nonlinear mechanical behaviors of colloidal suspensions at the particl...
Colloidal suspensions exhibit shear thinning and shear thickening. The most common interpretation of...
241 pagesColloidal suspensions consisting of solid particles in a fluid are ubiquitous in industry a...
International audienceWe study the flow of suspensions of non-Brownian particles dispersed into a Ne...
International audienceWe study the flow of suspensions of non-Brownian particles dispersed into a Ne...
We investigate the effect of shear flow on the microstructure of colloidal suspensions by means of m...
Shear thickening is a phenomenon in which the viscosity of a suspension increases with increasing st...
Shear thickening, which corresponds to an increase of viscosity with shear rate, is ubiquitously obs...
International audienceThe process by which sheared suspensions go through a dramatic change in visco...
Shear thickening, which corresponds to an increase of viscosity with shear rate, is ubiquitously obs...
This paper focuses on shear-thinning in non-Brownian suspensions. In particular, it proposes a quant...
Restricted sliding or rotational motion of colloidal particles plays a key role in the emergence of ...
Dense suspensions can exhibit an abrupt change in their viscosity in response to increasing shear ra...
Dense suspensions can exhibit an abrupt change in their viscosity in response to increasing shear ra...
We review the sequences of structural states that can be induced in colloidal suspensions by the app...