You dont need any of that stuff if you have a good enough general grasp of physics, especially in the general terms we are speaking.
The coanda effect is in play, but the majority of it is from downwash.
I don't disagree with that in the least. I posted earlier I think Coanda starts the plume off, then the downwash takes over. The other two are saying Coanda has no effect whatsoever. That I disagree with.