Intermittency exponent of the turbulent energy cascade

Correlation functions were used for investigating the turbulent energy dissipation and for obtaining the intermittency exponents. Air and gaseous helium were used at cryogenic temperatures. In a wind tunnel the air data were obtained in a number of flows and the atmospheric boundary layer at a height of 35 m above the ground. The air data increased with the Taylor microscale Reynolds number whereas the helium data clustered at a value that was about half of the asymptotic value for the air data.