Laminar-turbulent pattern formation is a distinctive feature of the intermittency regime in
subcritical plane shear flows. By performing extensive numerical simulations of the plane …

Input–output analysis of transitional channel flows has proven to be a valuable analytical
tool for identifying important flow structures and energetic motions. The traditional approach …

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 study the temporal linear instability of channel flow subject to a tensorial slip boundary
condition that models the slip effect induced by microgroove-type superhydrophobic …

The subcritical transition in a two-dimensional channel flow is characterized by the
emergence of localized wave packet (LWP). In this paper, the nonlinear nonmodal …

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 …

Recently, many authors have investigated the origin and growth of turbulent bands in shear
flows, highlighting the role of streaks and their inflectional instability in the process of band …

In this work, we employ structured input–output analysis to study the flow patterns in
transitional plane Couette–Poiseuille flow (CPF). First, we focus on the well-studied …

In this work, nonlinear variational optimization is used for obtaining minimal seeds for the
formation of turbulent bands in channel flow. Using nonlinear optimization together with …

Channel flow turbulence exhibits interesting spatiotemporal complexities at transitional
Reynolds numbers. In this paper, we investigated some aspects of the kinematics and …