I get it. "Turbulence" usually means "chaos" (e.g. air turbulence), but when we're talking about liquid passing a solid we say "turbulent flow" to mean something else. We mean friction does not cause the otherwise brisk liquid to slink just where it meets the solid boundary (e.g. pin, pipe wall, fin). Turbulent flow grabs heat faster than sticky "laminar" flow.
Chaotic flow creates spots of turbulence incidentally, but there are better ways to engineer turbulence just where it matters.
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