Layer formation and relaminarisation in plane Couette flow with spanwise stratification
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Abstract
Recent research has shed light on the role of coherent structures in forming
layers when stably stratified turbulence is forced with horizontal shear
(Lucas, Caulfield & Kerswell, J. Fluid Mech., vol. 832, 2017, pp. 409-437).
Here we extend our previous work to investigate the effect of rigid boundaries
on the dynamics by studying stably-stratified plane Couette flow with gravity
oriented in the spanwise direction. We observe near-wall layering and
associated new mean flows in the form of large scale spanwise-flattened
streamwise rolls. The layers exhibit the expected buoyancy scaling
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1469-7645