Features of Turbulence

Eddy Frequency Range

For a pipe 2 cm in diameter with water flowing at about 0.5 m/s ( ), the energy containing eddies have a frequency of about 10-20 Hz. The dissipative eddies are in the range of 100-300 Hz. For , the dissipative eddies get into range of kHz. The size of large eddies in the core region is about 50% of the pipe diameter (i.e. about 1 cm).