Browsing Department of Materials Science and Metallurgy by Subject "transition to turbulence"

Now showing items 1-4 of 4

  • A new method for isolating turbulent states in transitional stratified plane Couette flow 

    Taylor, John Ryan; Deusebio, E; Caulfield, Colm-cille Patrick; Kerswell, Richard Rodney (Cambridge University PressJournal of Fluid Mechanics, 2016-10-26)
    We present a new adaptive control strategy to isolate and stabilize turbulent states in transitional, stably stratified plane Couette flow in which the gravitational acceleration (non-dimensionalized as the bulk Richardson ...

  • Designing a more nonlinearly stable laminar flow via boundary manipulation 

    Rabin, SME; Caulfield, Colm-cille Patrick; Kerswell, Richard Rodney (Cambridge University PressJournal of Fluid Mechanics, 2013-12-04)
    We show how a fully nonlinear variational method can be used to design a more nonlinearly stable laminar shear flow by quantifying the effect of manipulating the boundary conditions of the flow. Using the example of plane ...

  • Nonlinear evolution of linear optimal perturbations of strongly stratified shear layers 

    Taylor, John Ryan; Caulfield, Colm-cille Patrick; Kaminski, AK (Cambridge University PressJournal of Fluid Mechanics, 2017-08-25)
    The Miles-Howard theorem states that a necessary condition for normal-mode instability in parallel, inviscid, steady stratified shear flows is that the minimum gradient Richardson number, $Ri_{g,min}$, is less than 1/4 ...

  • Secondary instability and tertiary states in rotating plane Couette flow 

    Daly, CA; Schneider, Tobias M; Schlatter, Philipp; Peake, Nigel (Cambridge University PressJournal of Fluid Mechanics, 2014-11-14)
    Recent experimental studies have shown rich transition behaviour in rotating plane Couette ow (RPCF). In this paper we study the transition in supercritical RPCF theoretically by determination of equilibrium and periodic ...