Related Experiment Video
Updated: Aug 8, 2026

Challenges in Rheological Characterization of Highly Concentrated Suspensions — A Case Study for Screen-printing Silver Pastes
Published on: April 10, 2017
Yielding and flow in adhesive and nonadhesive concentrated emulsions
Lydiane Bécu1, Sébastien Manneville, Annie Colin
1Centre de Recherche Paul Pascal, UPR CNRS 8641, 115 Avenue Schweitzer, 33600 Pessac, France.
Abstract:
The nonlinear rheological response of soft glassy materials is addressed experimentally by focusing on concentrated emulsions where interdroplet attraction is tuned through varying the surfactant content. Velocity profiles are recorded using ultrasonic velocimetry simultaneously to global rheological data in the Couette geometry. Our data show that nonadhesive and adhesive emulsions have radically different flow behaviors in the vicinity of yielding: while the flow remains homogeneous in the nonadhesive emulsion and the Herschel-Bulkley model for a yield stress fluid describes the data very accurately, the adhesive system displays shear localization and does not follow a simple constitutive equation, suggesting that the mechanisms involved in yielding transitions are not universal.
More Related Videos
06:48Tuning the Contractility and Deformation Modes of Active Actin-Based Assemblies In Vitro: From Two-Dimensional Active Networks to Liquid Crystal Drops
Published on: July 11, 2025
08:58Double Emulsion Generation Using a Polydimethylsiloxane (PDMS) Co-axial Flow Focus Device
Published on: December 25, 2015
Related Concept Videos
Types of Fluids
In contrast, non-Newtonian fluids do not follow Newton's law of viscosity, and their...
Surface Tension, Capillary Action, and Viscosity
The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
Adhesion
Capillary action is a result of water’s adhesive tendencies. When a narrow glass...
The Colloidal State
Viscosity
The SI unit of viscosity is...
Rise of Liquid in a Capillary Tube