Inverse energy cascade in a turbulent round jet.
Large eddy simulation of turbulent free round jet has been performed to study statistical properties of turbulence, including third-order structure functions. It has been shown the presence of a zone within the jet initial region where the spectral flux of turbulent energy is directed from smaller scales toward larger ones and the longitudinal third-order structure function becomes positive. Energy spectra calculated in this zone demonstrate the E(k) approximately k(-3) law specific for two-dimensional turbulence.
Hrebtov
M Yu
MY
Kutateladze Institute of Thermophysics, SB RAS, Novosibirsk, Russia.
Ilyushin
B B
BB
Krasinsky
D V
DV