The phrase "turbulent eddies" refers to small, swirling currents in a fluid (such as air or water) that are chaotic and unstable. These eddies can cause turbulence and disturbances in the flow of the fluid. Full definition
Turbulent eddy diffusion takes energy up from the ocean rather than down from the surface because warm water is lighter than colder water. (scienceofdoom.com)
For such flow profiles the processes that sustain and create turbulent eddies fail and the fluid gradually returns to smooth laminar motion and it remained laminar until it reached the end of the pipe. (sciencedaily.com)
The stream of smoke is smooth enough for a start, but suddenly breaks into random turbulent eddies whose behaviour is inherently unpredictable. (judithcurry.com)