Home > Research > Publications & Outputs > Multiple critical velocities in oscillatory flo...

Electronic data

  • TuningForkTransition_PRB_rev_submitted

    Rights statement: © 2016 American Physical Society

    Accepted author manuscript, 694 KB, PDF document

    Available under license: CC BY-NC: Creative Commons Attribution-NonCommercial 4.0 International License


Text available via DOI:

View graph of relations

Multiple critical velocities in oscillatory flow of superfluid 4He due to quartz tuning forks

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Article number214503
<mark>Journal publication date</mark>1/12/2016
<mark>Journal</mark>Physical review B
Issue number21
Number of pages13
Publication StatusPublished
<mark>Original language</mark>English


We report recent investigations into the transition to turbulence in superfluid $^4$He, realized experimentally by measuring the drag forces acting on two custom-made quartz tuning forks with fundamental resonances at 6.5 kHz and 55.5 kHz, in the temperature range 10 mK to 2.17 K. In pure superfluid in the zero temperature limit, three distinct critical velocities were observed with
both tuning forks. We discuss the signicance of all critical velocities and associate the third critical velocity reported here for the first time with the development of large vortical structures in the flow, which thus starts to mimic turbulence in classical fluids. The interpretation of our results is directly
linked to previous experimental work with oscillators such as tuning forks, grids and vibrating wires, focusing on the behavior of purely superfluid $^4$He at very low temperatures

Bibliographic note

© 2016 American Physical Society