A mechanism for streamwise localisation of nonlinear waves in shear flows

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Title:	A mechanism for streamwise localisation of nonlinear waves in shear flows
Author:	Mellibovsky Elstein, Fernando; Meseguer Serrano, Álvaro
Other authors:	Universitat Politècnica de Catalunya. Departament de Física; Universitat Politècnica de Catalunya. DF - Dinàmica No Lineal de Fluids
Abstract:	We present the complete unfolding of streamwise localisation in a paradigm of extended shear flows, namely two-dimensional plane Poiseuille flow. Exact solutions of the Navier-Stokes equations are computed numerically and tracked in the streamwise wavenumber-Reynolds number parameter space to identify and describe the fundamental mechanism behind streamwise localisation, a ubiquitous feature of shear flow turbulence. Unlike shear flow spanwise localisation, streamwise localisation does not follow the snaking mechanism demonstrated for plane Couette flow.
Abstract:	Peer Reviewed
Subject(s):	-Àrees temàtiques de la UPC::Física::Física de fluids -Fluid mechanics -Bifurcation -Instability -Turbulent transition -Plane Poiseuille flow -Swift-Hohenberg equation -Finite-amplitude waves -Pipe-flow -Traveling-waves -Turbulence transition -Pattern-formation -Wall turbulence -Couette-flow -Bifurcation -Mecànica de fluids
Rights:	http://creativecommons.org/licenses/by-nc-nd/3.0/es/
Document type:	Article - Submitted version Article
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