It is indeed difficult to do in a radial pattern.
In Radius, I'm limited to 4 "jets" (versus WW's 8), and I'm still not convinced that it'll reach the bottom of the center fins (nor in WW).
In any case, the purpose is to speed up the coolant, for more turbulence, which is "relatively" inefficient, because turbulators can do this better (true "jet inpingement" notwithstanding), where the former requires a more powerful pump.
In multiple jet direct die cooling, where true "jet inpingement" principle is applied, it'll work very nicely, but it should be remembered that it's a requirement because of the large surface area. A heavy pump is a must. Also, it's probably the most efficient way of doing it, but only because there are no other options: no surface dimpling, no fins, etc...
WW combines a couple of principles, so does Radius, so they should come very close to direct die results.
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