Abstract
We report new observations of low-pressure filaments in a turbulent flow between counter-rotating disks [1]. Cavitation from microscopic gas bubbles seeding the water is used to probe the structure of the pressure field. The spatial structure of the low-pressure events, mainly vertical filaments standing along the disks axis, are visualized using a high speed video system. The negative tail of the probability density functions of pressure is determined from light scattering measurements performed with a fast photo detector, and is found to be exponential. These observations highlight the importance of the large scales on the pressure fluctuations.
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Moisy, F., Porta, A.u.L., Voth, G., Bodenschatz, E. (2000). Using Cavitation as a Probe of Low-Pressure Filaments in Turbulence. In: Maurel, A., Petitjeans, P. (eds) Vortex Structure and Dynamics. Lecture Notes in Physics, vol 555. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-44535-8_17
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DOI: https://doi.org/10.1007/3-540-44535-8_17
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