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Article Dans Une Revue European Journal of Mechanics - B/Fluids Année : 1998

Experimental and numerical investigations of low-temperature superfluid turbulence

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Low-temperature superfluid turbulence is studied experimentally in a Helium swirling flow and numerically with the Gross-Pitaevskii equation in the geometry of the Taylor-Green (TG) vortex flow. Numerically, it was found in Nore et al. (1997a, b) that the kinetic energy transfer in the superfluid TG vortex is comparable to that of the viscous TG vortex and that the energy spectrum of the superflow is compatible with Kolmogorov's scaling. The vorticity dynamics of the superflow are similar to that of the viscous flow. In both cases, many vortex reconnection events happen throughout the flow. Experimentally, power measurements and pressure fluctuation spectra show very little difference above and far below the superfluid transition temperature, where the normal-fluid component of Helium is negligible (less than 5% in mass at T = 1.2 K).
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hal-00426545 , version 1 (29-03-2021)

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Malek Abid, Marc Brachet, Jean Maurer, Caroline Nore, Patrick Tabeling. Experimental and numerical investigations of low-temperature superfluid turbulence. European Journal of Mechanics - B/Fluids, 1998, 17 (4), pp.665-675. ⟨10.1016/S0997-7546(98)80019-8⟩. ⟨hal-00426545⟩
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