Abstract
We report new results obtained with a strong laboratory vortex, generated between rotating disks with an axial stretching, providing a model of strong vortex structures present in turbulent flows. We first characterize the strength of the vortex in this geometry by means of a global pressure measurement, and give direct evidence of a mechanism of stretching saturation due to strong rotation. Pressure measurements are then performed with a miniature probe sensor close to the vortex, in order to study the relevance of bulk measurements with small but invasive sensors. We analyze the influence of some geometric characteristics of the probe (size, distance from the vortex) on the measured pressure, together with the influence of the presence of a probe on the vortex strength. We briefly discuss consequences of these observations on pressure measurements in the bulk of turbulent flows.
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© 2000 Springer-Verlag Berlin Heidelber
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Moisy, F., Petitjeans, P. (2000). Pressure Measurements in a Stretched Vortex. 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_16
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DOI: https://doi.org/10.1007/3-540-44535-8_16
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