I'm aware that K-H instabilities arise when there are two overlying parallel flows of different shear and density. In this case the instability would occur at the interface. What of an instance where the flows are perpendicular? I haven't come across any literature discussing this possibility. Anyone know of a source?
The problem that I'm investigating is related to topics in atmospheric science, specifically the planetary boundary layer. A lot of overlap can be found between the two branches, but I'm looking at a specific problem that might require a detour in this direction. I have found laboratory experiments discussing the interaction of two jets, but these are narrow jets, and I'm not sure the same would result if the jets were much broader O~100km.
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