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11:15
15 mins
LIQUID HELIUM FLOWS AROUND AN OSCILLATING CYLINDER
Daniel Duda, Patrik Svancara, Marco La Mantia, Miloš Rotter, Ladislav Skrbek
Session: Superfluids 1
Session starts: Wednesday 26 August, 10:30
Presentation starts: 11:15
Room: Room E
Daniel Duda (Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic)
Patrik Svancara (Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic)
Marco La Mantia (Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic)
Miloš Rotter (Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic)
Ladislav Skrbek (Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic)
Abstract:
The complementary flows of normal viscous liquid helium (He I) and of superfluid helium (He II) around an oscillating obstacle, of rectangular cross-section, have been studied experimentally by using the particle tracking velocimetry technique, with solid deuterium particles. The observed particle behaviour in He II is very similar to that seen in He I. It seems therefore that, without some kind of special forcing acting differently on each superfluid helium component, on length scales which the experiment can access, the oscillating quantum flow mimics the classical one.