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 …

The flow of viscoelastic fluids in channels and pipes remains poorly understood, particularly
at low Reynolds numbers. Here, we investigate the flow of polymeric solutions in straight …

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 …

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 …

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 …

In the present study, we investigated flow structures and properties of elastic turbulence in
straight 2D channel viscoelastic fluid flow and tested earlier observations. We discovered …

Turbulence in dilute polymer solutions when polymers are strongly stretched by the flow is
investigated. We establish power-law spectra of velocity, that are not associated with a flux …

Following our first report (A Groisman and V Steinberg 2000 Nature 405 53), we present an
extended account of experimental observations of elasticity-induced turbulence in three …

Nontrivial steady flows have recently been found that capture the main structures of the
turbulent buffer layer. We study the effects of polymer addition on these “exact coherent …

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 …