The talk Quantum Turbulence, by Ladislav Skrbek (Department of Low-Temperature Physics, Charles University) will be held on Monday December 5, 2016 at 9:00 in room K3.
Quantum turbulence can be loosely defined as the most general way of motion of quantum fluids displaying superfluidity. We introduce basic physical properties of quantum fluids, focusing on liquid helium, including its two-fluid behaviour and quantized vortices. We describe quantum turbulence in comparison with classical turbulence in incompressible viscous fluids. We then discuss recent experiments performed in the Department of Low Temperature Physics: (i) steady and decaying quantum channel flows (coflow, counterflow and pure superflow of superfluid helium) probed by second sound attenuation technique, (ii) visualization of various mechanically and thermally generated quantum flows and (iii) oscillatory flows due to vibrating objects and their transition to quantum turbulence.