Browsing by Author "Kerswell, Richard Rodney"
Now showing items 1-6 of 6
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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 ...
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Connection between nonlinear energy optimization and instantons.
Lecoanet, Daniel; Kerswell, Richard Rodney (American Physical SocietyPhysical review. E, 2018-01)How systems transit between different stable states under external perturbation is an important practical issue. We discuss here how a recently developed energy optimization method for identifying the minimal disturbance ...
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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 ...
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Energy dissipation rate limits for flow through rough channels and tidal flow across topography (vol 808, pg 562, 2016)
Kerswell, Richard Rodney (JOURNAL OF FLUID MECHANICS, 2018-01-10)This is a corrigendum
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Layer formation in horizontally forced stratified turbulence: Connecting exact coherent structures to linear instabilities
Lucas, D; Caulfield, Colm-cille Patrick; Kerswell, Richard Rodney (Journal of Fluid Mechanics, 2017-12-10)© 2017 Cambridge University Press. We consider turbulence in a stratified 'Kolmogorov' flow, driven by horizontal shear in the form of sinusoidal body forcing in the presence of an imposed background linear stable ...
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Using stratification to mitigate end-effects in quasi-Keplerian Taylor-Couette flow
Leclercq, Colin; Partridge, Jamie L; Augier, Pierre; Dalziel, Stuart Bruce; Kerswell, Richard Rodney (Cambridge University PressJournal of Fluid Mechanics, 2016-02-24)Efforts to model accretion disks in the laboratory using Taylor–Couette flow apparatus are plagued with problems due to the substantial impact the end-plates have on the flow. We explore the possibility of mitigating the ...