Fluid dynamics turbulence refers to the chaotic and unpredictable dynamics of flows.
Despite the fact that the equations governing the motion of fluids are known since more than …

The current work qualitatively surveys the phenomenon of polymer drag reduction from the
standpoint of the salient coherent motions in the near-wall region of wall-bounded turbulent …

Beneitez et al.(Phys. Rev. Fluids, vol. 8, 2023, L101901) have recently discovered a new
linear 'polymer diffusive instability'(PDI) in inertialess rectilinear viscoelastic shear flow using …

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 …

Motivated by the recent numerical results of Khalid et al.(Phys. Rev. Lett., vol. 127, 2021,
134502), we consider the large-Weissenberg-number (neutral curve, confirming the inferred …

This retrospective aims to present a coherent history of important findings in direct numerical
simulations and experiments in turbulent Taylor–Couette (TC) flow of dilute polymeric …

Polymer-laden turbulent pipe flows are investigated through direct numerical simulations
with Lagrangian transport, and back reaction, of 1 0 8 polymers, modelled as FENE …

Elasto-inertial turbulence (EIT) is a recently discovered two-dimensional chaotic flow state
observed in dilute polymer solutions. Two possibilities are currently hypothesized to be …

The presence of a tiny amount of polymers (a few parts per million) in a fluid dramatically
reduces turbulent drag. For this reason, polymer additives have been proposed to be used …