Next: 6.1 Mixing layers:
(Panton3 23.5, 6, Tennekes & Lumley 4)
Maybe someday an Oracle of Delphi will arise that can actually model turbulence accurately. Do not hold your breath.
Until then, the most solid way to learn some real stuff about turbulence is without doubt dimensional analysis. Dimensional analysis does not require you to actually solve the equations. It just requires you to figure out what is important and what is not.
Some important examples follow.