Pressure fluctuations in swirling turbulent flows

S. Fauve , C. Laroche , B. Castaing

We report measurements of pressure fluctuations in swirling turbulent flows generated in the gap between two rotating coaxial disks. We relate the pressure spectra to the observed flow regimes in the case of co-rotating and counter-rotating disks. In the latter case, we show that the pressure probability density function is strongly non-Gaussian and displays an exponential tail toward low pressures which might be ascribed to intermittent vorticity concentrated on tube-like structures. Similarly, the behavior of the high pressure fluctuations results from the geometry of dissipative structures.

Domaines: Articles anciens

S. Fauve, C. Laroche, B. Castaing. Pressure fluctuations in swirling turbulent flows. Journal de Physique II, 1993, 3 (3), pp.271-278. ⟨10.1051/jp2:1993129⟩. ⟨jpa-00247830⟩