Ladislav Skrbek (Charles University) gives a webinar on Quantum turbulence in helium superfluids: Phenomenological experimentalist’s view, and where do we go next?.

The talk is an overview of selected topics of quantum turbulence (QT) [1] - the stochastic motion of quantum fluids He II and 3He-B, recently described in detail in Ref. [1]. We focus on unified phenomenological description of 3D QT [2] (especially of the Vinen and Kolmogorov forms of QT, emerging as a direct consequence of quantum mechanical constraint on circulation in a superfluid) and description of transition to QT [3] (based on quantum channel flows, high-Stokes-number oscillatory flows and spherical counterflow [4]), both in the zero temperature limit and at finite temperatures where these superfluids display the two-fluid behavior.

[1] C.F. Barenghi, L. Skrbek and K.R. Sreenivasan, Quantum turbulence, Cambridge Univ. Press, 2023 [2] L. Skrbek, D. Schmoranzer, S. Midlik, K.R. Sreenivasan, Phenomenology of quantum turbulence in superfluid helium, Proc. Natl. Acad. Sci., U.S.A. 118, e2018406118 (2021). [3] L. Skrbek, D. Schmoranzer, K.R. Sreenivasan, Phenomenology of transition to quantum turbulence in superfluid helium, Proc. Natl. Acad. Sci., U.S.A, in print. [4] F. Novotný, Y. Huang, J. Kvorka, Š. Midlik, D. Schmoranzer, Z. Xie, L. Skrbek, Spherical thermal counterflow of superfluid 4He, submitted to Phys. Rev. Fluids