Lookup NU author(s): Dr George Stagg,
Dr Joy Allen,
Professor Carlo Barenghi,
Dr Nicholas Parker
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
We reinvestigate numerically the classic problem of two-dimensional superfluid flow past an obstacle. Taking the obstacle to be elongated (perpendicular to the flow), rather than the usual circular form, is shown to promote the nucleation of quantized vortices, enhance their subsequent interactions, and lead to wakes which bear striking similarity to their classical (viscous) counterparts. Then, focussing on the recent experiment of Kwon et al. (arXiv:1403.4658) in a trapped condensate, we show that an elliptical obstacle leads to a cleaner and more efficient means to generate two-dimensional quantum turbulence.
Author(s): Stagg GW, Allen AJ, Barenghi CF, Parker NG
Publication type: Article
Publication status: Published
Journal: Journal of Physics: Conference Series
Online publication date: 25/03/2015
Acceptance date: 25/03/2015
Date deposited: 01/05/2015
ISSN (print): 1742-6588
ISSN (electronic): 1742-6596
Publisher: Institute of Physics Publishing Ltd.
Notes: 23rd International Laser Physics Workshop (LPHYS’14), 14–18 July 2014, Sofia, Bulgaria
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