J. Phys. II France
Volume 4, Numéro 5, May 1994
Page(s) 725 - 733
DOI: 10.1051/jp2:1994101
J. Phys. II France 4 (1994) 725-733

Analysis of pressure fluctuations in swirling turbulent flows

P. Abry, S. Fauve, P. Flandrin and C. Laroche

Laboratoire de Physique, CNRS-URA 1325, Ecole Normale Supérieure de Lyon, 46 Allée d'Italie, 69364 Lyon, France

(Received 10 December 1993, accepted 21 January 1994)

Turbulent flows display intermittent pressure drops associated with vorticity concentrations. Using wavelet transform, we characterize these low pressure events and study some of their statistical characteristics in a flow generated between the gap of two counter-rotating disks. We show that the mean frequency of intermittent pressure drops decreases with increasing Reynolds number.

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