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F. Celestini, R. Kofman
J. Jean Rajchenbach
LPMC, CNRS UMR662
Université de Nice-Sophia Antipolis
The interaction of two hydraulic jumps creates a stable fluid arch supported by a thin liquid sheet.
When a water jet impinges upon a solid surface it produces the well-known circular hydraulic jump that everyone can observe in the sink of its kitchen. . It is characterized by a central thin liquid sheet bounded by a circular rise of the water height due to the combined effect of capillary and gravitational forces. In this experiment we study the interaction between two circular hydraulic jumps as a function of their distance and the flux supplied by the two water jets. For a sufficiently small distance and/or large fluxes we observe the structure represented in the picture. One can observe the merging of two hydraulic jumps on the substrate, and the consecutive formation of a stable fluid arch supported by a thin liquid sheet. For larger velocities the arch is broken in two rims and the fluid is ejected at the top of it.
Reporters may freely use this image. Credit: F. Celestini, R. Kofman and J. Jean Rajchenbach, LPMC, CNRS UMR662, Université de Nice-Sophia Antipolis (2010).