Abstract

A new laboratory facility for studying gravity wave critical-layer interactions is described, and the results from one experiment are presented. In the experiment, a forced, monochromatic gravity wave is allowed to propagate into a stratified shear flow containing a critical level for the gravity wave. The early evoluation of the flow is characterized by turbulent wavebreaking and mean flow modifications which are in qualitative agreement with previous numerical simulations. The late-time critical layer flow is characterized by internal mixing regions which are phase-locked to the incoming gravity wave.

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