apologies about the error - wiki article says the "remaining components" are zero, which means there's something that isn't, my bad.
Yes, that's what I read - two different domains with independent (or nearly independent?) flow, which means you could design it carefully to avoid a lot of shear in the centre - which is (on a skim reading) roughly what a Rankine vortex is.
Yes, that's what I read - two different domains with independent (or nearly independent?) flow, which means you could design it carefully to avoid a lot of shear in the centre - which is (on a skim reading) roughly what a Rankine vortex is.