Polymers are remarkable molecules that have relaxation times that can span 15 orders of
magnitude. The very longest of the relaxation times for high molecular weight polymers are …

Although drag reduction due to the addition of small amounts of long-chain polymers has
been a well-known phenomenon for about fifty years, its mechanism is still poorly …

Addition of a small amount of very large polymer molecules or micelle-forming surfactants to
a liquid can dramatically reduce the energy dissipation it exhibits in the turbulent flow …

Progress in understanding turbulent drag reduction by polymer additives has recently been
made on several fronts. The near-wall dynamics of Newtonian turbulence is becoming better …

The influence of an external flow on the relaxation dynamics of a single polymer is
investigated theoretically and numerically. We show that a pronounced dynamical slowdown …

The drag of turbulent flows can be drastically decreased by adding small amounts of high
molecular weight polymers. While drag reduction initially increases with polymer …

Polymer-induced drag reduction is the phenomenon by which the friction factor of a turbulent
flow is reduced by the addition of small amounts of high-molecular-weight linear polymers …

Flexible polymers in dilute solution enhance the viscosity in slow flows. But in strong, rapidly
varying, shear fields, they behave elastically. A turbulent cascade (from large to small …

The interaction of polymers with small-scale velocity gradients can trigger a coil-stretch
transition in the polymers. We analyze this transition within a direct numerical simulation of …

This paper is intended as an overview of the current status of research on the dynamics of
dilute polymer solutions, aimed primarily at the “nonspecialist” who is interested in …