The Hydraulic Jump in Liquid Helium

Details The Hydraulic Jump in Liquid Helium The Hydraulic Jump in Liquid Helium

2005-08-29

arxiv.org/abs/physics/0508200v1

Physics

Fluid Dynamics

Submitted to the proceedings of the 24th International Conference on Low Temperature Physics. 2 figures

Scientific paper

10.1063/1.2354642

We present the results of some experiments on the circular hydraulic jump in normal and superfluid liquid helium. The radius of the jump and the depth of the liquid outside the jump are measured through optical means. Although the scale of the apparatus is rather small, the location of the jump is found to be consistent with the assumption that the jump can be treated as a shock, if the surface tension is taken into account. The radius of the jump does not change when going down in temperature through the lambda point; we think that the flow is supercritical. A remarkable feature of the experiment is the observation of stationary ripples within the jump when the liquid is superfluid.

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