12,000

We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK

93%

93% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > Flow of He II due to an oscillating grid in the...
View graph of relations

« Back

Flow of He II due to an oscillating grid in the low-temperature limit.

Research output: Contribution to journalJournal article

Published

Journal publication date06/2004
JournalPhysical Review Letters
Journal number24
Volume92
Pages244501
Original languageEnglish

Abstract

The macroscopic flow properties of pure He II are probed in the limit of zero temperature using an oscillating grid. As the oscillation amplitude passes a first critical threshold, the resonant frequency starts decreasing but the flow remains nondissipative. Beyond a second critical amplitude, the flow undergoes a transition to turbulence and becomes dissipative. Nonlinearity and hysteresis observed between the thresholds are attributed to a boundary layer of quantized vortices.