| Issue |
EPJ Web of Conferences
Volume 45, 2013
EFM12 – Experimental Fluid Mechanics 2012
|
|
|---|---|---|
| Article Number | 01005 | |
| Number of page(s) | 4 | |
| DOI | https://doi.org/10.1051/epjconf/20134501005 | |
| Published online | 09 April 2013 | |
https://doi.org/10.1051/epjconf/20134501005
Lagrangian velocity distributions in thermal counterflow of superfluid 4He
Faculty of Mathematics and Physics, Charles University, Ke Karlovu 3, 121 16 Prague, Czech Republic
a e-mail: lamantia@nbox.troja.mff.cuni.cz
Quantum turbulence in thermal counterflow of superfluid 4He is visualized and studied at length scales comparable to the average distance between quantized vortices. The lagrangian velocities of micrometer- sized deuterium particles are obtained in a planar section of the flow field by using the particle tracking velocime- try technique. It is shown that the lagrangian velocity normalized distributions are strongly non-gaussian, with power-law tails, in contrast to the nearly gaussian distributions obtained in classical turbulent flows. The average distance between quantized vortices can therefore be seen as the length scale indicating the transition between classical-like and quantum behavior in thermal counterflow of superfluid 4He.
© Owned by the authors, published by EDP Sciences, 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.