We numerically studied high-aspect-ratio channel flows with spanwise sidewalls, that is,
wide duct flows, in its subcritical turbulent transitional regime. The infinite channel flow is …

We investigated the side-wall effects on turbulent bands in channel flow at transitional
Reynolds numbers by direct numerical simulations using the open source spectral-element …

We study the shape evolution of puffs composed of tracers advected in a transitional
channel flow. We perform a direct numerical simulation of a spatially evolving channel flow …

In this work, we study the flow in curved channels, an archetypal configuration that allows
insights into problems featuring turbulence bounded by curved walls. Besides its relevance …

Directed percolation (DP) and subcritical turbulent transitions in channel flow, which have
been a debatable issue in recent years, are investigated by direct numerical simulations for …

This thesis investigates the effect of a drag-reducing polymer on laminar-turbulent transition
in a gravity-driven channel flow. The drag-reducing polymer is polyacrylamide (PAM) …

Spatially accelerating turbulent flows occur in many applications and contain intriguing flow
phenomena, most notably laminarisation, which causes rapid changes in flow …

抄録 The effect of polymer addition on transition to turbulence in a two-dimensional water-
flow channel was experimentally investigated by flow visualization using reflective flakes …

抄録 In this study, visualization experiments of plane Couette flow were conducted to
investigate the spatio-temporal variation of turbulent stripes, the spanwise wavelength, and …