Spectral analysis of a dissipative turbulent flow

In turbulent flows small scale structures are responsible of turbulent kinetic energy dissipation. Although the rate of this dissipation has been extensively studied, as this parameter is widely used in modelling, quantitative results on dissipation as a function of frequencies or wave-numbers are scarcely available. In vibro- acoustics a largely used method, the Inhomogeneous Wave Correlation method, allows spectral analyses of wave-fields and also provides information on their dissipative behaviour. Thus we analysed with the IWC method a dissipative turbulent flow of our interest. The dissipation of turbulent kinetic energy is quantified as well as its frequency dependence.