Experiments and numerical simulations have shown that turbulence in transitional wall-
bounded shear flows frequently takes the form of long oblique bands if the domains are …

The flow between concentric cylinders is routinely used in soft matter studies. In many cases,
the purpose of the setup is rheometric: the idea is to relate macroscopic changes in material …

Turbulence is one of the most frequently encountered non-equilibrium phenomena in
nature, yet characterizing the transition that gives rise to turbulence in basic shear flows has …

Directed percolation (DP) has recently emerged as a possible solution to the century old
puzzle surrounding the transition to turbulence. Multiple model studies reported DP …

In wall-bounded parallel flows, sustained turbulence can occur even while laminar flow is
still stable. Channel flow is one of such flows and displays spatiotemporal fluctuating …

Turbulent-laminar banded patterns in plane Poiseuille flow are studied via direct numerical
simulations in a tilted and translating computational domain using a parallel version of the …

Intermittent turbulent-laminar patterns characterize the transition to turbulence in pipe, plane
Couette, and plane channel flows. The time evolution of turbulent-laminar bands in plane …

Transitional localized turbulence in shear flows is known to either decay to an absorbing
laminar state or to proliferate via splitting. The average passage times from one state to the …

Many transitional shear flows show a regime of complex spatiotemporal dynamics that has
been linked to directed percolation. Using direct numerical simulations of plane-Poiseuille …

In this letter, we show via numerical simulations that the typical flow structures appearing in
transitional channel flows at moderate Reynolds numbers are not spots but isolated …