When subjected to sufficiently strong velocity gradients, solutions of long, flexible polymers
exhibit flow instabilities and chaotic motion, often referred to as elastic turbulence. Its …

Solutions of long, flexible polymer molecules are complex fluids that simultaneously exhibit
fluid-like and solid-like behavior. When subjected to an external flow, dilute polymer …

Recent studies of pressure-driven flows of dilute polymer solutions in straight channels
demonstrated the existence of two-dimensional coherent structures that are disconnected …

Elastic turbulence is a chaotic flow state observed in dilute polymer solutions in the absence
of inertia. It was discovered experimentally in circular geometries and has long been thought …

Viscoelastic shear flows support additional chaotic states beyond simple Newtonian
turbulence. In vanishing Reynolds number flows, the nonlinearity in the polymer evolution …

Elasto-inertial turbulence (EIT) is a new, two-dimensional chaotic flow state observed in
polymer solutions with possible connections to inertialess elastic turbulence and drag …

Direct numerical simulation of purely elastic turbulence (ET) in the Taylor-Couette flow of
dilute polymer solutions is used to identify the dominant flow structures, namely, unsteady …

We experimentally investigate the flow of a viscoelastic fluid in a parallel shear geometry at
low Reynolds number. As the flow becomes unstable via a nonlinear subcritical instability …

Viscoelastic plane Poiseuille flow is shown to become linearly unstable in the absence of
inertia, in the limit of high elasticities, for ultradilute polymer solutions. While inertialess …

The properties of dilute polymer solutions are governed by the conformational dynamics of
individual polymers which can be perturbed in the presence of an applied flow. Much of our …