The Oldroyd-B model has been used extensively to predict a host of instabilities in shearing
flows of viscoelastic fluids, often realized experimentally using polymer solutions. The …

Complex and active fluids find broad applications in flows through porous materials.
Nontrivial rheology can couple to porous microstructure leading to surprising flow patterns …

Viscoelastic fluids are a common subclass of rheologically complex materials that are
encountered in diverse fields from biology to polymer processing. Often the flows of …

We investigate purely elastic flow instabilities in the almost ideal planar stagnation point
elongational flow field generated by a microfluidic optimized-shape cross-slot extensional …

We review progress and open challenges for a number of problems related to the Oldroyd B
model which are of current interest to the mathematical community. We discuss existence …

The log-conformation formulation, proposed by Fattal and Kupferman [J. Non-Newt. Fluid
Mech. 123 (2004) 281], has helped to provide further insights into the High-Weissenberg …

The flow of viscoelastic polymeric fluids through porous media is common in industrial
applications such as oil recovery and groundwater remediation. Polymeric stresses can lead …

Wormlike micellar surfactant solutions are encountered in a wide variety of important
applications, including enhanced oil recovery and ink-jet printing, in which the fluids are …

Part I of this paper [Haward et al., J. Rheol. 67, 995–1009 (2023)] presents a three-
dimensional microfluidic device (the optimized uniaxial and biaxial extensional rheometer …

Characterization of the extensional rheometry of fluids with complex microstructures is of
great relevance to the optimization of a wide range of industrial applications and for …