Now it sounds like “a definite catalog” of the “on the shelf” structures :-). But this is very good that those will not be
“mixed” in the literature by quoting the same “structure” by many different names
e.g. Low-speed streaks
or
Horseshoe vortices:

or bulges

or streamwise vortices:

What I do not understand is why the funnels are not listed [from here]:
Categories:

