Topical Problems of Fluid Mechanics


Institute of Thermomechanics AS CR, v.v.i.	CTU in Prague Faculty of Mech. Engineering Dept. Tech. Mathematics	MIO Université du Sud Toulon Var - AMU - CNRS - IRD	Czech Pilot centre ERCOFTAC

Visualization of Large-Scale Flow Due to an Oscillating Tuning Fork in Normal and Superfluid Helium
D. Duda, M. La Mantia, L. Skrbek
Abstract:
Liquid ⁴He has two phases: above the superfluid transition it is a classical low-viscosity fluid (He I), while below about 2.17K it is superfluid (He II), exhibiting the two-fluid behaviour. Using the particle tracking velocimetry technique, we present visualization of large-scale flow structures occurring in the surrounding bulk liquid due to a fast oscillating quartz tuning fork, in both He I and He II, and discuss their similarities and differences.
Keywords:
Liquid helium, Super fluidity, Oscillatory flow, Streaming

Fulltext: PDF DOI: https://doi.org/10.14311/TPFM.2017.014

In Proceedings Topical Problems of Fluid Mechanics 2017, Prague, 2017 Edited by David Šimurda and Tomáš Bodnár, pp. 103-112 ISBN 978-80-87012-61-1 (Print) ISSN 2336-5781 (Print)