Journal
JOURNAL OF FLUID MECHANICS
Volume 738, Issue -, Pages -Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1017/jfm.2013.601
Keywords
nonlinear instability; transition to turbulence; variational methods
Categories
Funding
- EPSRC
- Higher Education Funding Council for England
- EPSRC [EP/H050310/1]
- Engineering and Physical Sciences Research Council [EP/H050310/1] Funding Source: researchfish
Ask authors/readers for more resources
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 Couette flow, we demonstrate that by forcing the boundaries to undergo spanwise oscillations in a certain way, it is possible to increase the critical disturbance energy for the onset of turbulence by 41 %. If this is sufficient to ensure laminar flow (i.e. ambient noise does not exceed this increased threshold), nearly four times less energy is consumed than in the turbulent flow which exists in the absence of imposed spanwise oscillations.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available