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Rev Sci Instrum. 2014 Oct;85(10):103908. doi: 10.1063/1.4897542.

Superfluid high REynolds von Kármán experiment.

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Université Grenoble Alpes, INAC-SBT, F-38000 Grenoble, France.
Laboratoire Interdisciplinaire des Énergies de Demain (LIED) - CNRS-UMR 8236, Université Paris Diderot - Sorbonne Paris Cite, Paris, France.
Laboratoire de Physique de l'ENS de Lyon, CNRS/Université Lyon, F-69364 Lyon cedex 7, France.
Université Grenoble Alpes, INAC-SBT, F-38041 Grenoble, France.
Laboratoire SPHYNX, CEA/IRAMIS/SPEC, CNRS URA 2464, F-91191 Gif-sur-Yvette, France.
Université Grenoble Alpes, Inst NEEL, F-38042 Grenoble, France.
LUTH, Observatoire Paris-Meudon, 5 Pl. Jules Janssen, F-92195 Meudon Cedex, France.


The Superfluid High REynolds von Kármán experiment facility exploits the capacities of a high cooling power refrigerator (400 W at 1.8 K) for a large dimension von Kármán flow (inner diameter 0.78 m), which can work with gaseous or subcooled liquid (He-I or He-II) from room temperature down to 1.6 K. The flow is produced between two counter-rotating or co-rotating disks. The large size of the experiment allows exploration of ultra high Reynolds numbers based on Taylor microscale and rms velocity [S. B. Pope, Turbulent Flows (Cambridge University Press, 2000)] (Rλ > 10000) or resolution of the dissipative scale for lower Re. This article presents the design and first performance of this apparatus. Measurements carried out in the first runs of the facility address the global flow behavior: calorimetric measurement of the dissipation, torque and velocity measurements on the two turbines. Moreover first local measurements (micro-Pitot, hot wire,…) have been installed and are presented.


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